platform: msm8909: Add SPI panel init function to support msm8909w

Add changes to:
1.add SPI panel transfer function
2.add SPI panel display config.

Change-Id: Id8387ee8dcd281af57bbec731a9fa009b5b0cb45
Signed-off-by: Wenjun Zhang <wjzhan@codeaurora.org>
diff --git a/target/target_display.c b/target/target_display.c
index 6904825..d32e90d 100644
--- a/target/target_display.c
+++ b/target/target_display.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2015,2018 The Linux Foundation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
@@ -131,3 +131,18 @@
 {
 	return 0;
 }
+
+__WEAK int mdss_spi_init(void)
+{
+	return 0;
+}
+
+__WEAK int mdss_spi_panel_init(struct msm_panel_info *pinfo)
+{
+	return 0;
+}
+
+__WEAK int mdss_spi_on(struct msm_panel_info *pinfo, struct fbcon_config *fb)
+{
+	return 0;
+}