[ARM] Fix another build error with IOP3xx platforms

ld doesn't like comments starting with // in its scripts
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/arch-iop3xx/iop321.h

@@ -40,7 +40,7 @@
 #define IOP321_PCI_UPPER_IO_BA      (IOP321_PCI_LOWER_IO_BA + IOP321_PCI_IO_WINDOW_SIZE - 1)
 #define IOP321_PCI_IO_OFFSET        (IOP321_PCI_LOWER_IO_VA - IOP321_PCI_LOWER_IO_BA)
 
-//#define IOP321_PCI_MEM_WINDOW_SIZE  (~*IOP321_IALR1 + 1)
+/* #define IOP321_PCI_MEM_WINDOW_SIZE  (~*IOP321_IALR1 + 1) */
 #define IOP321_PCI_MEM_WINDOW_SIZE  0x04000000 /* 64M outbound window */
 #define IOP321_PCI_LOWER_MEM_PA     0x80000000
 #define IOP321_PCI_LOWER_MEM_BA     (*IOP321_OMWTVR0)