Fix 'writeable' typos

We have about 30 instances of the typo/variant spelling 'writeable',
and over 500 of the more common 'writable'.  Standardize on the
latter.

Change produced with:

  sed -i -e 's/\([Ww][Rr][Ii][Tt]\)[Ee]\([Aa][Bb][Ll][Ee]\)/\1\2/g' $(git grep -il writeable)

and then hand-undoing the instance in linux-headers/linux/kvm.h.

Most of these changes are in comments or documentation; the
exceptions are:
 * a local variable in accel/hvf/hvf-accel-ops.c
 * a local variable in accel/kvm/kvm-all.c
 * the PMCR_WRITABLE_MASK macro in target/arm/internals.h
 * the EPT_VIOLATION_GPA_WRITABLE macro in target/i386/hvf/vmcs.h
   (which is never used anywhere)
 * the AR_TYPE_WRITABLE_MASK macro in target/i386/hvf/vmx.h
   (which is never used anywhere)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Message-id: 20220505095015.2714666-1-peter.maydell@linaro.org

hw/intc/arm_gicv3_cpuif.c

@@ -2047,7 +2047,7 @@ static void icc_ctlr_el3_write(CPUARMState *env, const ARMCPRegInfo *ri,
         cs->icc_ctlr_el1[GICV3_S] |= ICC_CTLR_EL1_CBPR;
     }
 
-    /* The only bit stored in icc_ctlr_el3 which is writeable is EOIMODE_EL3: */
+    /* The only bit stored in icc_ctlr_el3 which is writable is EOIMODE_EL3: */
     mask = ICC_CTLR_EL3_EOIMODE_EL3;
 
     cs->icc_ctlr_el3 &= ~mask;

hw/intc/arm_gicv3_dist.c

@@ -611,7 +611,7 @@ static bool gicd_writel(GICv3State *s, hwaddr offset,
         if (value & mask & GICD_CTLR_DS) {
             /* We just set DS, so the ARE_NS and EnG1S bits are now RES0.
              * Note that this is a one-way transition because if DS is set
-             * then it's not writeable, so it can only go back to 0 with a
+             * then it's not writable, so it can only go back to 0 with a
              * hardware reset.
              */
             s->gicd_ctlr &= ~(GICD_CTLR_EN_GRP1S | GICD_CTLR_ARE_NS);

hw/intc/arm_gicv3_redist.c

@@ -257,7 +257,7 @@ static void gicr_write_vpendbaser(GICv3CPUState *cs, uint64_t newval)
 
     /*
      * The DIRTY bit is read-only and for us is always zero;
-     * other fields are writeable.
+     * other fields are writable.
      */
     newval &= R_GICR_VPENDBASER_INNERCACHE_MASK |
         R_GICR_VPENDBASER_SHAREABILITY_MASK |
@@ -491,7 +491,7 @@ static MemTxResult gicr_writel(GICv3CPUState *cs, hwaddr offset,
         /* RAZ/WI for our implementation */
         return MEMTX_OK;
     case GICR_WAKER:
-        /* Only the ProcessorSleep bit is writeable. When the guest sets
+        /* Only the ProcessorSleep bit is writable. When the guest sets
          * it it requests that we transition the channel between the
          * redistributor and the cpu interface to quiescent, and that
          * we set the ChildrenAsleep bit once the inteface has reached the

hw/intc/riscv_aclint.c

@@ -463,7 +463,7 @@ static void riscv_aclint_swi_realize(DeviceState *dev, Error **errp)
     /* Claim software interrupt bits */
     for (i = 0; i < swi->num_harts; i++) {
         RISCVCPU *cpu = RISCV_CPU(qemu_get_cpu(swi->hartid_base + i));
-        /* We don't claim mip.SSIP because it is writeable by software */
+        /* We don't claim mip.SSIP because it is writable by software */
         if (riscv_cpu_claim_interrupts(cpu, swi->sswi ? 0 : MIP_MSIP) < 0) {
             error_report("MSIP already claimed");
             exit(1);

hw/intc/riscv_aplic.c

@@ -646,7 +646,7 @@ static void riscv_aplic_write(void *opaque, hwaddr addr, uint64_t value,
     }
 
     if (addr == APLIC_DOMAINCFG) {
-        /* Only IE bit writeable at the moment */
+        /* Only IE bit writable at the moment */
         value &= APLIC_DOMAINCFG_IE;
         aplic->domaincfg = value;
     } else if ((APLIC_SOURCECFG_BASE <= addr) &&