Makefile: move all Power Architecture boards into boards.cfg

Clean up Makefile, and drop a lot of the config.mk files on the way.

We now also automatically pick all boards that are listed in
boards.cfg (and with all configurations), so we can drop the redundant
entries from MAKEALL to avoid building these twice.

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/board/freescale/mpc832xemds/pci.c b/board/freescale/mpc832xemds/pci.c
index b58f734..8cab771 100644
--- a/board/freescale/mpc832xemds/pci.c
+++ b/board/freescale/mpc832xemds/pci.c
@@ -121,10 +121,10 @@
 	/* initialize the PCA9555PW IO expander on the PIB board */
 	pib_init();
 
-#if defined(PCI_66M)
+#if defined(CONFIG_PCI_66M)
 	clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
 	printf("PCI clock is 66MHz\n");
-#elif defined(PCI_33M)
+#elif defined(CONFIG_PCI_33M)
 	clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2 |
 	    OCCR_PCICD0 | OCCR_PCICD1 | OCCR_PCICD2 | OCCR_PCICR;
 	printf("PCI clock is 33MHz\n");