staging: sm750fb: change definition of PANEL_WINDOW_WIDTH fields

Use stratight-forward defintion of PANEL_WINDOW_WIDTH register fields and
use open-coded implementation for register manipulations
Signed-off-by: Mike Rapoport <mike.rapoport@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/sm750fb/ddk750_reg.h

@@ -838,8 +838,9 @@
 #define PANEL_FB_WIDTH_OFFSET_MASK                    0x3fff
 
 #define PANEL_WINDOW_WIDTH                            0x080014
-#define PANEL_WINDOW_WIDTH_WIDTH                      27:16
-#define PANEL_WINDOW_WIDTH_X                          11:0
+#define PANEL_WINDOW_WIDTH_WIDTH_SHIFT                16
+#define PANEL_WINDOW_WIDTH_WIDTH_MASK                 (0xfff << 16)
+#define PANEL_WINDOW_WIDTH_X_MASK                     0xfff
 
 #define PANEL_WINDOW_HEIGHT                           0x080018
 #define PANEL_WINDOW_HEIGHT_HEIGHT                    27:16

drivers/staging/sm750fb/sm750_hw.c

@@ -318,9 +318,10 @@ int hw_sm750_crtc_setMode(struct lynxfb_crtc *crtc,
 		reg |= (fix->line_length & PANEL_FB_WIDTH_OFFSET_MASK);
 		POKE32(PANEL_FB_WIDTH, reg);
 
-		POKE32(PANEL_WINDOW_WIDTH,
-			FIELD_VALUE(0, PANEL_WINDOW_WIDTH, WIDTH, var->xres - 1)|
-			FIELD_VALUE(0, PANEL_WINDOW_WIDTH, X, var->xoffset));
+		reg = ((var->xres - 1) << PANEL_WINDOW_WIDTH_WIDTH_SHIFT) &
+		       PANEL_WINDOW_WIDTH_WIDTH_MASK;
+		reg |= (var->xoffset & PANEL_WINDOW_WIDTH_X_MASK);
+		POKE32(PANEL_WINDOW_WIDTH, reg);
 
 		POKE32(PANEL_WINDOW_HEIGHT,
 			FIELD_VALUE(0, PANEL_WINDOW_HEIGHT, HEIGHT, var->yres_virtual - 1)|