ARM: pxa: reduce the scope of get_memclk_frequency_10khz()

Up to now, only pxa2xx pcmcia driver is using the API. No other device driver
is using this API in PXA3xx or any other PXA silicons.

Restrict the scope only on pxa2xx and remove the implementation of pxa3xx. So
we can avoid oo much checking on cpuid after more pxa chips supported.
Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

arch/arm/mach-pxa/generic.c

@@ -79,8 +79,7 @@ unsigned int get_memclk_frequency_10khz(void)
 		return pxa25x_get_memclk_frequency_10khz();
 	else if (cpu_is_pxa27x())
 		return pxa27x_get_memclk_frequency_10khz();
-	else
-		return pxa3xx_get_memclk_frequency_10khz();
+	return 0;
 }
 EXPORT_SYMBOL(get_memclk_frequency_10khz);
 

arch/arm/mach-pxa/generic.h

@@ -54,11 +54,9 @@ static inline void pxa2xx_clear_reset_status(unsigned int mask) {}
 
 #ifdef CONFIG_PXA3xx
 extern unsigned pxa3xx_get_clk_frequency_khz(int);
-extern unsigned pxa3xx_get_memclk_frequency_10khz(void);
 extern void pxa3xx_clear_reset_status(unsigned int);
 #else
 #define pxa3xx_get_clk_frequency_khz(x)		(0)
-#define pxa3xx_get_memclk_frequency_10khz()	(0)
 static inline void pxa3xx_clear_reset_status(unsigned int mask) {}
 #endif
 

arch/arm/mach-pxa/pxa3xx.c

@@ -98,23 +98,6 @@ unsigned int pxa3xx_get_clk_frequency_khz(int info)
 	return CLK / 1000;
 }
 
-/*
- * Return the current static memory controller clock frequency
- * in units of 10kHz
- */
-unsigned int pxa3xx_get_memclk_frequency_10khz(void)
-{
-	unsigned long acsr;
-	unsigned int smcfs, clk = 0;
-
-	acsr = ACSR;
-
-	smcfs = (acsr >> 23) & 0x7;
-	clk = (acsr & ACCR_D0CS) ? RO_CLK : smcfs_mult[smcfs] * BASE_CLK;
-
-	return (clk / 10000);
-}
-
 void pxa3xx_clear_reset_status(unsigned int mask)
 {
 	/* RESET_STATUS_* has a 1:1 mapping with ARSR */