UPSTREAM: soc/amd/phoenix: update mmconf base address and size

0xF8000000 was taken from old platform during phoenix porting, updating
it to 0xE0000000 to make room for 256 pci busses which is required for
usb4 and hotplug support. mmconf size gets set to 0x10000000 when 256
busses are used.

(cherry picked from commit 75a073d5ffbdf9bd787b3310c8cbee6c664b2a17)

Original-Change-Id: Ic143171f5650aff5db48c8f477d7aca3e7f5c1e7
Original-Signed-off-by: Ritul Guru <ritul.bits@gmail.com>
Original-Reviewed-on: https://review.coreboot.org/c/coreboot/+/71870
Original-Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
GitOrigin-RevId: 75a073d5ffbdf9bd787b3310c8cbee6c664b2a17
Change-Id: I46e07333ac187636188a615924c77d9d04b4f7a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/4168599
Commit-Queue: Kangheui Won <khwon@chromium.org>
Reviewed-by: Kangheui Won <khwon@chromium.org>
Tested-by: CopyBot Service Account <copybot.service@gmail.com>
diff --git a/src/soc/amd/phoenix/Kconfig b/src/soc/amd/phoenix/Kconfig
index 346d155..883359c 100644
--- a/src/soc/amd/phoenix/Kconfig
+++ b/src/soc/amd/phoenix/Kconfig
@@ -230,10 +230,10 @@
 	default "apu/amdfw"
 
 config ECAM_MMCONF_BASE_ADDRESS
-	default 0xF8000000
+	default 0xE0000000
 
 config ECAM_MMCONF_BUS_NUMBER
-	default 64
+	default 256
 
 config MAX_CPUS
 	int