staging: sm750fb: change definition of PANEL_FB_WIDTH fields

Use stratight-forward defintion of PANEL_FB_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

@@ -833,8 +833,9 @@
 #define PANEL_FB_ADDRESS_ADDRESS_MASK                 0x1ffffff
 
 #define PANEL_FB_WIDTH                                0x080010
-#define PANEL_FB_WIDTH_WIDTH                          29:16
-#define PANEL_FB_WIDTH_OFFSET                         13:0
+#define PANEL_FB_WIDTH_WIDTH_SHIFT                    16
+#define PANEL_FB_WIDTH_WIDTH_MASK                     (0x3fff << 16)
+#define PANEL_FB_WIDTH_OFFSET_MASK                    0x3fff
 
 #define PANEL_WINDOW_WIDTH                            0x080014
 #define PANEL_WINDOW_WIDTH_WIDTH                      27:16

drivers/staging/sm750fb/sm750_hw.c

@@ -313,10 +313,10 @@ int hw_sm750_crtc_setMode(struct lynxfb_crtc *crtc,
 		reg = var->xres * (var->bits_per_pixel >> 3);
 		/* crtc->channel is not equal to par->index on numeric,be aware of that */
 		reg = ALIGN(reg, crtc->line_pad);
-
-		POKE32(PANEL_FB_WIDTH,
-			FIELD_VALUE(0, PANEL_FB_WIDTH, WIDTH, reg)|
-			FIELD_VALUE(0, PANEL_FB_WIDTH, OFFSET, fix->line_length));
+		reg = (reg << PANEL_FB_WIDTH_WIDTH_SHIFT) &
+		       PANEL_FB_WIDTH_WIDTH_MASK;
+		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)|