ARM: 6954/1: zImage: fix Thumb2 breakage

Commit af3e4fd3 "ARM: 6859/1: Add writethrough dcache support for
ARM926EJS processor" broke Thumb2 compilation by omitting to maintain
the wide encoding for the added branch instructions which made the
ARM926EJ-S record smaller than expected, breaking the record walk code.
Signed-off-by: NNicolas Pitre <nicolas.pitre@linaro.org>
Cc: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/boot/compressed/head.S

@@ -691,9 +691,9 @@ proc_types:
 
 		.word	0x41069260		@ ARM926EJ-S (v5TEJ)
 		.word	0xff0ffff0
-		b	__arm926ejs_mmu_cache_on
-		b	__armv4_mmu_cache_off
-		b	__armv5tej_mmu_cache_flush
+		W(b)	__arm926ejs_mmu_cache_on
+		W(b)	__armv4_mmu_cache_off
+		W(b)	__armv5tej_mmu_cache_flush
 
 		.word	0x00007000		@ ARM7 IDs
 		.word	0x0000f000