armv7: invalidate TLB after changing translation table entries

This adds a call to tlb_invalidate_all() after configuring a range
of memory.

Change-Id: I558402e7e54b6bf9e0b013f153d9b84c0873a6cf
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2946
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)

src/arch/armv7/lib/mmu.c

@@ -88,6 +88,9 @@ void mmu_config_range(unsigned long start_mb, unsigned long size_mb,
 
 	for (i = start_mb; i < start_mb + size_mb; i++)
 		ttb_entry[i] = (i << 20) | attr;
+
+	/* TODO: add helper to invalidate TLB by MVA */
+	tlb_invalidate_all();
 }
 
 void mmu_init(void)