[ARM] Reduce the number of unnecessary includes in decompressor.

This appears to work around the gcc problem where gcc adds extra
.globl directives into the assembly for misc.s for its internal
libgcc functions.

arch/arm/boot/compressed/misc.c

@@ -18,9 +18,8 @@
 
 unsigned int __machine_arch_type;
 
-#include <linux/kernel.h>
+#include <linux/string.h>
 
-#include <asm/uaccess.h>
 #include <asm/arch/uncompress.h>
 
 #ifdef STANDALONE_DEBUG