drm/mga: Use request_firmware() to load microcode

Image format is IHEX, one record for each pipe in order (record
addresses are ignored).

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/mga/mga_dma.c b/drivers/gpu/drm/mga/mga_dma.c
index 6c67a02..3c917fb 100644
--- a/drivers/gpu/drm/mga/mga_dma.c
+++ b/drivers/gpu/drm/mga/mga_dma.c
@@ -444,7 +444,7 @@
 {
 	drm_mga_private_t *const dev_priv =
 	    (drm_mga_private_t *) dev->dev_private;
-	unsigned int warp_size = mga_warp_microcode_size(dev_priv);
+	unsigned int warp_size = MGA_WARP_UCODE_SIZE;
 	int err;
 	unsigned offset;
 	const unsigned secondary_size = dma_bs->secondary_bin_count
@@ -619,7 +619,7 @@
 {
 	drm_mga_private_t *const dev_priv =
 	    (drm_mga_private_t *) dev->dev_private;
-	unsigned int warp_size = mga_warp_microcode_size(dev_priv);
+	unsigned int warp_size = MGA_WARP_UCODE_SIZE;
 	unsigned int primary_size;
 	unsigned int bin_count;
 	int err;