ARM: uniphier: de-couple SG macros into base address and offset

The SG_* macros represent the address of SoC-glue registers.
For a planned new SoC, its base address will be changed.

Turn the SG_* macros into the offset from the base address.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/clk/pll-pro4.c b/arch/arm/mach-uniphier/clk/pll-pro4.c
index 2ee2ed6..312a5fc 100644
--- a/arch/arm/mach-uniphier/clk/pll-pro4.c
+++ b/arch/arm/mach-uniphier/clk/pll-pro4.c
@@ -17,7 +17,7 @@
 	u32 tmp, clk_mode_axosel;
 
 	/* Set VPLL27A &  VPLL27B */
-	tmp = readl(SG_PINMON0);
+	tmp = readl(sg_base + SG_PINMON0);
 	clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
 
 	/* 25MHz or 6.25MHz is default for Pro4R, no need to set VPLLA/B */