staging: sm750fb: use BIT macro for POWER_MODE_CTRL single-bit fields

Replace complex definition of POWER_MODE_CTRL register fields with BIT()
macro 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_power.c

@@ -60,17 +60,15 @@ void setPowerMode(unsigned int powerMode)
 
 	/* Set up other fields in Power Control Register */
 	if (powerMode == POWER_MODE_CTRL_MODE_SLEEP) {
-		control_value =
+		control_value &= ~POWER_MODE_CTRL_OSC_INPUT;
 #ifdef VALIDATION_CHIP
-		FIELD_SET(control_value, POWER_MODE_CTRL, 336CLK, OFF) |
+		control_value &= ~POWER_MODE_CTRL_336CLK;
 #endif
-		FIELD_SET(control_value, POWER_MODE_CTRL, OSC_INPUT,  OFF);
 	} else {
-		control_value =
+		control_value |= POWER_MODE_CTRL_OSC_INPUT;
 #ifdef VALIDATION_CHIP
-		FIELD_SET(control_value, POWER_MODE_CTRL, 336CLK, ON) |
+		control_value |= POWER_MODE_CTRL_336CLK;
 #endif
-		FIELD_SET(control_value, POWER_MODE_CTRL, OSC_INPUT,  ON);
 	}
 
 	/* Program new power mode. */

drivers/staging/sm750fb/ddk750_reg.h

@@ -497,16 +497,10 @@
 
 #define POWER_MODE_CTRL                               0x00004C
 #ifdef VALIDATION_CHIP
-    #define POWER_MODE_CTRL_336CLK                    4:4
-    #define POWER_MODE_CTRL_336CLK_OFF                0
-    #define POWER_MODE_CTRL_336CLK_ON                 1
+    #define POWER_MODE_CTRL_336CLK                    BIT(4)
 #endif
-#define POWER_MODE_CTRL_OSC_INPUT                     3:3
-#define POWER_MODE_CTRL_OSC_INPUT_OFF                 0
-#define POWER_MODE_CTRL_OSC_INPUT_ON                  1
-#define POWER_MODE_CTRL_ACPI                          2:2
-#define POWER_MODE_CTRL_ACPI_OFF                      0
-#define POWER_MODE_CTRL_ACPI_ON                       1
+#define POWER_MODE_CTRL_OSC_INPUT                     BIT(3)
+#define POWER_MODE_CTRL_ACPI                          BIT(2)
 #define POWER_MODE_CTRL_MODE                          1:0
 #define POWER_MODE_CTRL_MODE_MODE0                    0
 #define POWER_MODE_CTRL_MODE_MODE1                    1