mips: ath79: Rename get_bootstrap into ath79_get_bootstrap

Add a platform prefix for function name in order to make more readable,
and move it into ath79.h

Signed-off-by: Wills Wang <wills.wang@live.com>
Acked-by: Marek Vasut <marex@denx.de>
diff --git a/arch/mips/mach-ath79/ar933x/clk.c b/arch/mips/mach-ath79/ar933x/clk.c
index 9fcd496..6d98efc 100644
--- a/arch/mips/mach-ath79/ar933x/clk.c
+++ b/arch/mips/mach-ath79/ar933x/clk.c
@@ -9,7 +9,7 @@
 #include <asm/addrspace.h>
 #include <asm/types.h>
 #include <mach/ar71xx_regs.h>
-#include <mach/reset.h>
+#include <mach/ath79.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -17,7 +17,7 @@
 {
 	u32 val;
 
-	val = get_bootstrap();
+	val = ath79_get_bootstrap();
 	if (val & AR933X_BOOTSTRAP_REF_CLK_40)
 		return 40000000;
 	else