[PATCH] MIPS: Alchemy: fix build with SERIAL_8250=n

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In commit 7d172bfefb72a8dae56beff326299c5e21f6f6db I introduced platform
PM methods which call a function of the 8250 driver;  this patch works
around link failures when the kernel isn't built with 8250 support.

Signed-off-by: Manuel Lauss <manuel.lauss@xxxxxxxxxxxxxx>
---
 arch/mips/alchemy/common/platform.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/mips/alchemy/common/platform.c b/arch/mips/alchemy/common/platform.c
index 3691630..9e7814d 100644
--- a/arch/mips/alchemy/common/platform.c
+++ b/arch/mips/alchemy/common/platform.c
@@ -27,6 +27,7 @@
 static void alchemy_8250_pm(struct uart_port *port, unsigned int state,
 			    unsigned int old_state)
 {
+#ifdef CONFIG_SERIAL_8250
 	switch (state) {
 	case 0:
 		if ((__raw_readl(port->membase + UART_MOD_CNTRL) & 3) != 3) {
@@ -49,6 +50,7 @@ static void alchemy_8250_pm(struct uart_port *port, unsigned int state,
 		serial8250_do_pm(port, state, old_state);
 		break;
 	}
+#endif
 }
 
 #define PORT(_base, _irq)					\
-- 
1.7.3.2




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