drm/amdgpu/atom: add support for new mul32 opcodes (v2)

Better precision than the regular mul opcode.

v2: handle big endian properly.

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/atom.h

@@ -60,7 +60,7 @@
 #define ATOM_CT_PS_MASK		0x7F
 #define ATOM_CT_CODE_PTR	6
 
-#define ATOM_OP_CNT		123
+#define ATOM_OP_CNT		125
 #define ATOM_OP_EOT		91
 
 #define ATOM_CASE_MAGIC		0x63