Add wmac clock for rt2880

Signed-off-by: Roman Yeryomin <roman@advem.lv>

SVN-Revision: 40491

target/linux/ramips/patches-3.10/0218-rt2880-add-wmac-clock.patch

+Index: linux-3.10.34/arch/mips/ralink/rt288x.c
+===================================================================
+--- linux-3.10.34.orig/arch/mips/ralink/rt288x.c
++++ linux-3.10.34/arch/mips/ralink/rt288x.c
+@@ -52,7 +52,7 @@ static void rt288x_wdt_reset(void)
+ 
+ void __init ralink_clk_init(void)
+ {
+-	unsigned long cpu_rate;
++	unsigned long cpu_rate, wmac_rate = 40000000;
+ 	u32 t = rt_sysc_r32(SYSC_REG_SYSTEM_CONFIG);
+ 	t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK);
+ 
+@@ -78,6 +78,7 @@ void __init ralink_clk_init(void)
+ 	ralink_clk_add("300500.uart", cpu_rate / 2);
+ 	ralink_clk_add("300c00.uartlite", cpu_rate / 2);
+ 	ralink_clk_add("400000.ethernet", cpu_rate / 2);
++	ralink_clk_add("480000.wmac", wmac_rate);
+ }
+ 
+ void __init ralink_of_remap(void)