ARMv7: Add support for the ThumbEE state saving/restoring

This patch adds the detection and handling of the ThumbEE extension on
ARMv7 CPUs.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

include/asm-arm/thread_info.h

@@ -62,6 +62,9 @@ struct thread_info {
 	struct crunch_state	crunchstate;
 	union fp_state		fpstate __attribute__((aligned(8)));
 	union vfp_state		vfpstate;
+#ifdef CONFIG_ARM_THUMBEE
+	unsigned long		thumbee_state;	/* ThumbEE Handler Base register */
+#endif
 	struct restart_block	restart_block;
 };