drm/radeon: Fix multiple line dereference in 'atom_iio_execute'

Fixes the following:

WARNING: Avoid multiple line dereference - prefer 'ctx->io_attr'
+                           ((ctx->
+                             io_attr >> CU8(base + 2)) & (0xFFFFFFFF >> (32 -

Cc: Guchun Chen <guchun.chen@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Pan, Xinhui" <Xinhui.Pan@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/atom.c

@@ -163,13 +163,9 @@ static uint32_t atom_iio_execute(struct atom_context *ctx, int base,
 			    ~((0xFFFFFFFF >> (32 - CU8(base + 1))) <<
 			      CU8(base + 3));
 			temp |=
-			    ((ctx->
-			      io_attr >> CU8(base + 2)) & (0xFFFFFFFF >> (32 -
-									  CU8
-									  (base
-									   +
-									   1))))
-			    << CU8(base + 3);
+			    ((ctx->io_attr >> CU8(base + 2)) &
+			     (0xFFFFFFFF >> (32 - CU8(base + 1)))) <<
+			     CU8(base + 3);
 			base += 4;
 			break;
 		case ATOM_IIO_END: