Replace Qemu by QEMU in internal documentation

The official spelling is QEMU.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
diff --git a/CODING_STYLE b/CODING_STYLE
index 7c82d4d..dcbce28 100644
--- a/CODING_STYLE
+++ b/CODING_STYLE
@@ -1,4 +1,4 @@
-Qemu Coding Style
+QEMU Coding Style
 =================
 
 Please use the script checkpatch.pl in the scripts directory to check