docs: Spell QEMU all caps

Replace Qemu -> QEMU.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20211118143401.4101497-1-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

docs/devel/modules.rst

@@ -1,5 +1,5 @@
 ============
-Qemu modules
+QEMU modules
 ============
 
 .. kernel-doc:: include/qemu/module.h

docs/devel/multi-thread-tcg.rst

@@ -228,7 +228,7 @@ Emulated hardware state
 
 Currently thanks to KVM work any access to IO memory is automatically
 protected by the global iothread mutex, also known as the BQL (Big
-Qemu Lock). Any IO region that doesn't use global mutex is expected to
+QEMU Lock). Any IO region that doesn't use global mutex is expected to
 do its own locking.
 
 However IO memory isn't the only way emulated hardware state can be

docs/devel/style.rst

@@ -686,7 +686,7 @@ Rationale: hex numbers are hard to read in logs when there is no 0x prefix,
 especially when (occasionally) the representation doesn't contain any letters
 and especially in one line with other decimal numbers. Number groups are allowed
 to not use '0x' because for some things notations like %x.%x.%x are used not
-only in Qemu. Also dumping raw data bytes with '0x' is less readable.
+only in QEMU. Also dumping raw data bytes with '0x' is less readable.
 
 '#' printf flag
 ---------------

docs/devel/ui.rst

@@ -1,8 +1,8 @@
 =================
-Qemu UI subsystem
+QEMU UI subsystem
 =================
 
-Qemu Clipboard
+QEMU Clipboard
 --------------
 
 .. kernel-doc:: include/ui/clipboard.h