ARM: fix target address when disassembling Thumb BLX

A Thumb BLX instruction is branching to ARM code, and therefore the
first 2 bits of the target address must be cleared.

Signed-off-by: Nicolas Pitre <nico@marvell.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

src/target/arm_disassembler.c

@@ -1768,6 +1768,7 @@ static int evaluate_b_bl_blx_thumb(uint16_t opcode,
 		case 1:
 			instruction->type = ARM_BLX;
 			mnemonic = "BLX";
+			target_address &= 0xfffffffc;
 			break;
 		/* BL/BLX prefix */
 		case 2: