mb/google/brya: Enable RTD3 root port mutex for WWAN

This adds RTD3 RPMX mutex to the root port. It is shared between RTD3
and WWAN.

BRANCH=firmware-brya-14505.B
TEST=boot to OS and check the generated SSDT table for the root port.
The RPMX mutex should be generated under the root port.

Signed-off-by: Cliff Huang <cliff.huang@intel.com>
Change-Id: Ia87b5f9d8300d6263c84a586256424799d3a45b1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73382
Reviewed-by: Jérémy Compostella <jeremy.compostella@intel.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Bora Guvendik <bora.guvendik@intel.com>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>

src/mainboard/google/brya/variants/brya0/overridetree.cb

@@ -419,6 +419,7 @@ chip soc/intel/alderlake
 				register "srcclk_pin" = "5"
 				register "ext_pm_support" = "ACPI_PCIE_RP_EMIT_ALL"
 				register "skip_on_off_support" = "true"
+				register "use_rp_mutex" = "true"
 				device generic 0 alias rp6_rtd3 on
 					probe DB_LTE LTE_PCIE
 				end

src/mainboard/google/brya/variants/redrix/overridetree.cb

@@ -187,6 +187,7 @@ chip soc/intel/alderlake
 				register "srcclk_pin" = "5"
 				register "ext_pm_support" = "ACPI_PCIE_RP_EMIT_ALL"
 				register "skip_on_off_support" = "true"
+				register "use_rp_mutex" = "true"
 				device generic 0 alias rp6_rtd3 on
 					probe DB_LTE LTE_PCIE
 				end

src/mainboard/google/brya/variants/redrix4es/overridetree.cb

@@ -173,6 +173,7 @@ chip soc/intel/alderlake
 				register "srcclk_pin" = "5"
 				register "ext_pm_support" = "ACPI_PCIE_RP_EMIT_ALL"
 				register "skip_on_off_support" = "true"
+				register "use_rp_mutex" = "true"
 				device generic 0 alias rp6_rtd3 on
 					probe DB_LTE LTE_PCIE
 				end

src/mainboard/google/brya/variants/skolas/overridetree.cb

@@ -419,6 +419,7 @@ chip soc/intel/alderlake
 				register "srcclk_pin" = "5"
 				register "ext_pm_support" = "ACPI_PCIE_RP_EMIT_ALL"
 				register "skip_on_off_support" = "true"
+				register "use_rp_mutex" = "true"
 				device generic 0 alias rp6_rtd3 on
 					probe DB_LTE LTE_PCIE
 				end

src/mainboard/google/brya/variants/skolas4es/overridetree.cb

@@ -262,6 +262,7 @@ chip soc/intel/alderlake
 				register "srcclk_pin" = "5"
 				register "ext_pm_support" = "ACPI_PCIE_RP_EMIT_ALL"
 				register "skip_on_off_support" = "true"
+				register "use_rp_mutex" = "true"
 				device generic 0 alias rp6_rtd3 on
 					probe DB_LTE LTE_PCIE
 				end

src/mainboard/google/brya/variants/vell/overridetree.cb

@@ -200,6 +200,7 @@ chip soc/intel/alderlake
 				register "srcclk_pin" = "5"
 				register "ext_pm_support" = "ACPI_PCIE_RP_EMIT_ALL"
 				register "skip_on_off_support" = "true"
+				register "use_rp_mutex" = "true"
 				device generic 0 alias rp6_rtd3 on end
 			end
 			chip drivers/wwan/fm