fix(spmd): revert workaround hafnium as hypervisor

This change essentially reverts [1] by removing the BL31 workaround
forcing the dtb address when Hafnium is loaded as an Hypervisor.

[1] https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/9569

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: I302161d027261448113c66b7fafa9c11620b54ef
diff --git a/plat/arm/common/arm_bl31_setup.c b/plat/arm/common/arm_bl31_setup.c
index 6472590..a6f7df5 100644
--- a/plat/arm/common/arm_bl31_setup.c
+++ b/plat/arm/common/arm_bl31_setup.c
@@ -218,6 +218,10 @@
 	 * Linux kernel tree, Linux expects the physical address of the device
 	 * tree blob (DTB) in x0, while x1-x3 are reserved for future use and
 	 * must be 0.
+	 * Repurpose the option to load Hafnium hypervisor in the normal world.
+	 * It expects its manifest address in x0. This is essentially the linux
+	 * dts (passed to the primary VM) by adding 'hypervisor' and chosen
+	 * nodes specifying the Hypervisor configuration.
 	 */
 #if RESET_TO_BL31
 	bl33_image_ep_info.args.arg0 = (u_register_t)ARM_PRELOADED_DTB_BASE;
@@ -228,14 +232,6 @@
 	bl33_image_ep_info.args.arg2 = 0U;
 	bl33_image_ep_info.args.arg3 = 0U;
 # endif
-
-#if defined(SPD_spmd)
-	/*
-	 * Hafnium in normal world expects its manifest address in x0, In CI
-	 * configuration manifest is preloaded at 0x80000000(start of DRAM).
-	 */
-	bl33_image_ep_info.args.arg0 = (u_register_t)ARM_DRAM1_BASE;
-#endif
 }
 
 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,