PCI: brcmstb: Remove two unused constants from driver

Remove two constants in the driver which are no longer
used: RGR1_SW_INIT_1_INIT_MASK and RGR1_SW_INIT_1_INIT_SHIFT.

Link: https://lore.kernel.org/linux-pci/20240815225731.40276-9-james.quinlan@broadcom.com
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Stanimir Varbanov <svarbanov@suse.de>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Author: jamesequinlan

drivers/pci/controller/pcie-brcmstb.c

@@ -210,11 +210,6 @@ enum {
 	PCIE_INTR2_CPU_BASE,
 };
 
-enum {
-	RGR1_SW_INIT_1_INIT_MASK,
-	RGR1_SW_INIT_1_INIT_SHIFT,
-};
-
 enum pcie_type {
 	GENERIC,
 	BCM7425,