PCI: rcar: Avoid defines prefixed with CONFIG

Defines prefixed with "CONFIG" should be limited to proper Kconfig options,
that are introduced in a Kconfig file.

In the R-car driver the bitmask to configure the SEND_ENABLE mode is named
CONFIG_SEND_ENABLE.

Rename this local definition to a more suitable name, containing the
register bitfield name defined in the R-Car Gen3 rev. 2.30 user
manual.

No functional change.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lukas Bulwahn <[e-mail]>
[[e-mail]: Changed define naming and commit log]
Signed-off-by: Lorenzo Pieralisi <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>

drivers/pci/controller/pcie-rcar-host.c

···
 
 	/* Enable the configuration access */
 	if (pci_is_root_bus(bus->parent))
-		rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE0, PCIECCTLR);
+		rcar_pci_write_reg(pcie, PCIECCTLR_CCIE | TYPE0, PCIECCTLR);
 	else
-		rcar_pci_write_reg(pcie, CONFIG_SEND_ENABLE | TYPE1, PCIECCTLR);
+		rcar_pci_write_reg(pcie, PCIECCTLR_CCIE | TYPE1, PCIECCTLR);
 
 	/* Check for errors */
 	if (rcar_pci_read_reg(pcie, PCIEERRFR) & UNSUPPORTED_REQUEST)

drivers/pci/controller/pcie-rcar.h

···
 
 #define PCIECAR			0x000010
 #define PCIECCTLR		0x000018
-#define  CONFIG_SEND_ENABLE	BIT(31)
+#define  PCIECCTLR_CCIE		BIT(31)
 #define  TYPE0			(0 << 8)
 #define  TYPE1			BIT(8)
 #define PCIECDR			0x000020