target/arm: Move some TLBI insns to their own source file

target/arm/helper.c is very large and unwieldy.  One subset of code
that we can pull out into its own file is the cpreg arrays and
corresponding functions for the TLBI instructions.

Because these are instructions they are only relevant for TCG and we
can make the new file only be built for CONFIG_TCG.

In this commit we move the AArch32 instructions from:
 not_v7_cp_reginfo[]
 v7_cp_reginfo[]
 v7mp_cp_reginfo[]
 v8_cp_reginfo[]
into a new file target/arm/tcg/tlb-insns.c.

A few small functions are used both by functions we haven't yet moved
across and by functions we have already moved.  We temporarily make
these global with a prototype in cpregs.h; when the move of all TLBI
insns is complete these will return to being file-local.

For CONFIG_TCG, this is just moving code around.  For a KVM only
build, these cpregs will no longer be added to the cpregs hashtable
for the CPU.  However this should not be a behaviour change, because:
 * we never try to migration sync or otherwise include
   ARM_CP_NO_RAW cpregs
 * for migration we treat the kernel's list of system registers
   as the authoritative one, so these TLBI insns were never
   in it anyway
The no-tcg stub of define_tlb_insn_regs() therefore does nothing.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20241210160452.2427965-2-peter.maydell@linaro.org

target/arm/internals.h

@@ -1727,6 +1727,9 @@ static inline uint64_t pauth_ptr_mask(ARMVAParameters param)
 /* Add the cpreg definitions for debug related system registers */
 void define_debug_regs(ARMCPU *cpu);
 
+/* Add the cpreg definitions for TLBI instructions */
+void define_tlb_insn_regs(ARMCPU *cpu);
+
 /* Effective value of MDCR_EL2 */
 static inline uint64_t arm_mdcr_el2_eff(CPUARMState *env)
 {