platform: add DSI_PHY and DSI_PLL offsets in iomap headers

The DSI PHY and PLL register base addresses are different for
different targets from the DSI controller base. Update the
iomap header files of the targets with their base address
macros.

Change-Id: Ifd35a0e2195c34d872c7fa6ab7377d22cc06a768
diff --git a/platform/msm8974/include/platform/iomap.h b/platform/msm8974/include/platform/iomap.h
index 182f454..64f21ea 100644
--- a/platform/msm8974/include/platform/iomap.h
+++ b/platform/msm8974/include/platform/iomap.h
@@ -220,6 +220,10 @@
 #define MIPI_DSI_BASE               (0xFD922800)
 #define MIPI_DSI0_BASE              (MIPI_DSI_BASE)
 #define MIPI_DSI1_BASE              (0xFD922E00)
+#define DSI0_PHY_BASE               (0xFD922B00)
+#define DSI1_PHY_BASE               (0xFD923100)
+#define DSI0_PLL_BASE               (0xFD922A00)
+#define DSI1_PLL_BASE               (0xFD923000)
 #define REG_DSI(off)                (MIPI_DSI_BASE + 0x04 + (off))
 
 #define EDP_BASE                    (0xFD923400)