MIPS: pci: Remove duplicate define in mt7620 driver

An invalid and duplicate define has gone unnoticed for some time. lets
remove it. The correct define is 3 lines below.

Fixes: 7e5873d3 ("MIPS: pci: Add MT7620a PCIE driver")
Signed-off-by: NJohn Crispin <john@phrozen.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15320/Signed-off-by: NJames Hogan <jhogan@kernel.org>

arch/mips/pci/pci-mt7620.c

@@ -33,7 +33,6 @@
 #define RALINK_GPIOMODE			0x60
 
 #define PPLL_CFG1			0x9c
-#define PDRV_SW_SET			BIT(23)
 
 #define PPLL_DRV			0xa0
 #define PDRV_SW_SET			(1<<31)