[ARM] 2907/1: GCC 4 serial driver compile fixes

Patch from Vincent Sanders

When building the ARM platforms several serial drivers fail to compile
with GCC 4.01 due to extern/static ambiguity.

Signed-off-by: Vincent Sanders <vince@arm.linux.org.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index eaa0af8..672b359 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -589,8 +589,8 @@
 
 #ifdef CONFIG_SERIAL_PXA_CONSOLE
 
-extern struct uart_pxa_port serial_pxa_ports[];
-extern struct uart_driver serial_pxa_reg;
+static struct uart_pxa_port serial_pxa_ports[];
+static struct uart_driver serial_pxa_reg;
 
 #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)