target: Move the scm dload API to common file.

SCM call to put the device in download mode to a common file.
This API is common for all bear architecture targets. Also add
the TCSR_BOOT_MISC_DETECT register to the iomap header file.

Change-Id: Id7260918412548c05f3c08d693e4a1a70b69bceb
diff --git a/platform/msm8909/include/platform/iomap.h b/platform/msm8909/include/platform/iomap.h
index e2a66fe..bca7c54 100644
--- a/platform/msm8909/include/platform/iomap.h
+++ b/platform/msm8909/include/platform/iomap.h
@@ -280,4 +280,5 @@
 #define SECURITY_CONTROL_CORE_FEATURE_CONFIG0    0x0005E004
 /* EBI2 */
 #define TLMM_EBI2_EMMC_GPIO_CFG     (TLMM_BASE_ADDR + 0x00111000)
+#define TCSR_BOOT_MISC_DETECT       0x193D100
 #endif