ppc: Remove PCIPPC2 and PCIPPC6 boards

These boards seem to be unmaintained for quite some time. So lets
remove support for them completely. This also cleans up some
common drivers/files.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Guillaume Alexandre <guillaume.alexandre@gespac.ch>
Acked-by: Wolfgang Denk <wd@denx.de>

MAINTAINERS

@@ -150,9 +150,6 @@ Wolfgang Denk <wd@denx.de>
 
 	P3G4		MPC7410
 
-	PCIPPC2		MPC750
-	PCIPPC6		MPC750
-
 Phil Edworthy <phil.edworthy@renesas.com>
 
 	rsk7264		SH7264

arch/powerpc/cpu/74xx_7xx/cpu.c

@@ -229,8 +229,7 @@ soft_restart(unsigned long addr)
 }
 
 
-#if !defined(CONFIG_PCIPPC2) && \
-    !defined(CONFIG_BAB7xx)  && \
+#if !defined(CONFIG_BAB7xx)  && \
     !defined(CONFIG_ELPPC)   && \
     !defined(CONFIG_PPMC7XX)
 /* no generic way to do board reset. simply call soft_reset. */
@@ -288,13 +287,13 @@ unsigned long get_tbclk(void)
 /* ------------------------------------------------------------------------- */
 
 #if defined(CONFIG_WATCHDOG)
-#if !defined(CONFIG_PCIPPC2) && !defined(CONFIG_BAB7xx)
+#if !defined(CONFIG_BAB7xx)
 void
 watchdog_reset(void)
 {
 
 }
-#endif  /* !CONFIG_PCIPPC2 && !CONFIG_BAB7xx */
+#endif  /* !CONFIG_BAB7xx */
 #endif	/* CONFIG_WATCHDOG */
 
 /* ------------------------------------------------------------------------- */