MIPS: loongson32: Remove regs-rtc.h

Since commit 35508d2 ("MIPS: loongson32: ls1c: Fix hang
during startup"), no one is calling ls1x_rtc_set_extclk().
Therefore, remove this obsolete function.

Since commit 9fb2309 ("rtc: Remove the Loongson-1
RTC driver"), no one is using regs-rtc.h.
Therefore, remove this obsolete header file.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Author: kelvincheung

arch/mips/include/asm/mach-loongson32/loongson1.h

@@ -46,6 +46,5 @@
 #define LS1X_CLK_BASE			0x1fe78030
 
 #include <regs-mux.h>
-#include <regs-rtc.h>
 
 #endif /* __ASM_MACH_LOONGSON32_LOONGSON1_H */

arch/mips/include/asm/mach-loongson32/regs-rtc.h

@@ -265,14 +265,6 @@ struct platform_device ls1x_ehci_pdev = {
 };
 
 /* Real Time Clock */
-void __init ls1x_rtc_set_extclk(struct platform_device *pdev)
-{
-	u32 val = __raw_readl(LS1X_RTC_CTRL);
-
-	if (!(val & RTC_EXTCLK_OK))
-		__raw_writel(val | RTC_EXTCLK_EN, LS1X_RTC_CTRL);
-}
-
 struct platform_device ls1x_rtc_pdev = {
 	.name		= "ls1x-rtc",
 	.id		= -1,