serial: amba-pl011: fix !CONFIG_DMA_ENGINE case

I changed the prototype of the function earlier but only
in the section for CONFIG_DMA_ENGINE, not the alternative.
This makes the driver build again, e.g. for vexpress_defconfig.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index c25b00e..1c1942b 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -991,7 +991,7 @@
 
 #else
 /* Blank functions if the DMA engine is not available */
-static inline void pl011_dma_probe(struct uart_amba_port *uap)
+static inline void pl011_dma_probe(struct device *dev, struct uart_amba_port *uap)
 {
 }