Hexagon: add support for ARCH_PFN_OFFSET

Add support for loading the kernel at a physical offset.  The
offset should still be 4M aligned.

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index e4decc6..dd89a72 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -33,6 +33,7 @@
 	  Qualcomm Hexagon is a processor architecture designed for high
 	  performance and low power across a wide variety of applications.
 
+
 config HEXAGON_ARCH_V1
 	bool
 
@@ -45,6 +46,11 @@
 config HEXAGON_ARCH_V4
 	bool
 
+config HEXAGON_PHYS_OFFSET
+	def_bool y
+	---help---
+	  Platforms that don't load the kernel at zero set this.
+
 config FRAME_POINTER
 	def_bool y