mach-snapdragon: dynamic load addresses

Heavily inspired by Apple board code. Use the LMB allocator to configure
load addresses at runtime, and implement a lookup table for selecting a
devicetree.

As some Qualcomm RBx boards have different RAM capacities and base
addresses, it isn't possible to hardcode these regions.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Tested-by: Sumit Garg <sumit.garg@linaro.org> #qcs404
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 0c78c1b..c7c236b 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1096,6 +1096,7 @@
 	select OF_SEPARATE
 	select SMEM
 	select SPMI
+	select BOARD_LATE_INIT
 	select OF_BOARD
 	select SAVE_PREV_BL_FDT_ADDR
 	select LINUX_KERNEL_IMAGE_HEADER