powerpc: mpc512x: drop bogus and unused psc register bit definitions

These were introduced in commit 25ae3a0739c6 ("[POWERPC] mpc512x: Add
MPC512x PSC support to MPC52xx psc driver") and never used. Moreover
according to the datasheet[1] MEMERROR is bit 25 (0x40) and ORERR is
bit 27 (0x10).

[1] MPC5125RM Rev. 2; 11/2009

Signed-off-by: Uwe Kleine-König <[e-mail]>
Signed-off-by: Anatolij Gustschin <[e-mail]>

arch/powerpc/include/asm/mpc52xx_psc.h

···
 #define MPC512x_PSC_FIFO_FULL		0x2
 #define MPC512x_PSC_FIFO_ALARM		0x4
 #define MPC512x_PSC_FIFO_URERR		0x8
-#define MPC512x_PSC_FIFO_ORERR		0x01
-#define MPC512x_PSC_FIFO_MEMERROR	0x02
 
 struct mpc512x_psc_fifo {
 	u32		reserved1[10];