Revert "armv7m: Disable D-cache when booting nommu(ARMv7M) Linux kernel"

The author of the commit discovered later on that this was already being
done in cleanup_before_linux() on arch/arm/cpu/armv7m/cpu.c.

This reverts commit 8f079cccb3.

Signed-off-by: Tom Rini <trini@konsulko.com>

arch/arm/lib/bootm.c

@@ -360,7 +360,6 @@ static void boot_jump_linux(bootm_headers_t *images, int flag)
 #ifdef CONFIG_CPU_V7M
 	ulong addr = (ulong)kernel_entry | 1;
 	kernel_entry = (void *)addr;
-	dcache_disable();
 #endif
 	s = getenv("machid");
 	if (s) {