ARM: pxa: remove get_memclk_frequency_10khz()

Introduce 'struct clk' for memory and remove
get_memclk_frequency_10khz().

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

arch/arm/mach-pxa/generic.c

@@ -71,19 +71,6 @@ unsigned int get_clk_frequency_khz(int info)
 }
 EXPORT_SYMBOL(get_clk_frequency_khz);
 
-/*
- * Return the current memory clock frequency in units of 10kHz
- */
-unsigned int get_memclk_frequency_10khz(void)
-{
-	if (cpu_is_pxa25x())
-		return pxa25x_get_memclk_frequency_10khz();
-	else if (cpu_is_pxa27x())
-		return pxa27x_get_memclk_frequency_10khz();
-	return 0;
-}
-EXPORT_SYMBOL(get_memclk_frequency_10khz);
-
 /*
  * Intel PXA2xx internal register mapping.
  *