mfd: dbx500-prcmu: Drop set_display_clocks()

The display clocks are handled by the generic clock framework
since ages, this code is completely unused and misleading.
Delete it.

Cc: Stephan Gerhold <[e-mail]>
Cc: Ulf Hansson <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

drivers/mfd/db8500-prcmu.c

···
 #define PRCMU_CLK_38_SRC		(1 << 10)
 #define PRCMU_CLK_38_DIV		(1 << 11)
 
-/* PLLDIV=12, PLLSW=4 (PLLDDR) */
-#define PRCMU_DSI_CLOCK_SETTING		0x0000008C
-
-/* DPI 50000000 Hz */
-#define PRCMU_DPI_CLOCK_SETTING		((1 << PRCMU_CLK_PLL_SW_SHIFT) | \
-					  (16 << PRCMU_CLK_PLL_DIV_SHIFT))
-#define PRCMU_DSI_LP_CLOCK_SETTING	0x00000E00
-
 /* D=101, N=1, R=4, SELDIV2=0 */
 #define PRCMU_PLLDSI_FREQ_SETTING	0x00040165
 
···
 	writel(PRCMU_DISABLE_PLLDSI, PRCM_PLLDSI_ENABLE);
 	/* Disable  escapeclock */
 	writel(PRCMU_DISABLE_ESCAPE_CLOCK_DIV, PRCM_DSITVCLK_DIV);
-	return 0;
-}
-
-int db8500_prcmu_set_display_clocks(void)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&clk_mgt_lock, flags);
-
-	/* Grab the HW semaphore. */
-	while ((readl(PRCM_SEM) & PRCM_SEM_PRCM_SEM) != 0)
-		cpu_relax();
-
-	writel(PRCMU_DSI_CLOCK_SETTING, prcmu_base + PRCM_HDMICLK_MGT);
-	writel(PRCMU_DSI_LP_CLOCK_SETTING, prcmu_base + PRCM_TVCLK_MGT);
-	writel(PRCMU_DPI_CLOCK_SETTING, prcmu_base + PRCM_LCDCLK_MGT);
-
-	/* Release the HW semaphore. */
-	writel(0, PRCM_SEM);
-
-	spin_unlock_irqrestore(&clk_mgt_lock, flags);
-
 	return 0;
 }
 

include/linux/mfd/db8500-prcmu.h

···
 void db8500_prcmu_enable_wakeups(u32 wakeups);
 int db8500_prcmu_set_epod(u16 epod_id, u8 epod_state);
 int db8500_prcmu_request_clock(u8 clock, bool enable);
-int db8500_prcmu_set_display_clocks(void);
 int db8500_prcmu_disable_dsipll(void);
 int db8500_prcmu_enable_dsipll(void);
 void db8500_prcmu_config_abb_event_readout(u32 abb_events);
···
 }
 
 static inline int db8500_prcmu_request_clock(u8 clock, bool enable)
-{
-	return 0;
-}
-
-static inline int db8500_prcmu_set_display_clocks(void)
 {
 	return 0;
 }

include/linux/mfd/dbx500-prcmu.h

···
 	return db8500_prcmu_is_ac_wake_requested();
 }
 
-static inline int prcmu_set_display_clocks(void)
-{
-	return db8500_prcmu_set_display_clocks();
-}
-
 static inline int prcmu_disable_dsipll(void)
 {
 	return db8500_prcmu_disable_dsipll();
···
 static inline bool prcmu_is_ac_wake_requested(void)
 {
 	return false;
-}
-
-static inline int prcmu_set_display_clocks(void)
-{
-	return 0;
 }
 
 static inline int prcmu_disable_dsipll(void)