mb/google/rex: Select SOC_INTEL_METEORLAKE_U_P

Google/Rex is built with Intel Meteor Lake-U SoC, so select it.
Currently, there is no functional difference, but in the future FSP
UPD parameters can be overridden properly.

BUG=b:276697173
TEST=Able to build and boot google/rex.

Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I4c233e0a8ce58998dc1a0379662e386f9b3d0073
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75612
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
diff --git a/src/mainboard/google/rex/Kconfig b/src/mainboard/google/rex/Kconfig
index 89a2f81..cf038b7 100644
--- a/src/mainboard/google/rex/Kconfig
+++ b/src/mainboard/google/rex/Kconfig
@@ -38,7 +38,7 @@
 	select HAVE_SLP_S0_GATE
 	select MAINBOARD_HAS_CHROMEOS
 	select MEMORY_SOLDERDOWN
-	select SOC_INTEL_METEORLAKE
+	select SOC_INTEL_METEORLAKE_U_P
 	select SOC_INTEL_ENABLE_USB4_PCIE_RESOURCES
 	select SYSTEM_TYPE_LAPTOP
 	select TPM_GOOGLE_TI50