spi_qsd: Fix compilation warning

Fix following compilation warning:
warning: 'msm_spi_qup_irq' declared inline after being called

Change-Id: Icba083e85be775489147ad68fd9355be1c09fb14
Signed-off-by: Trilok Soni <tsoni@codeaurora.org>
diff --git a/drivers/spi/spi_qsd.h b/drivers/spi/spi_qsd.h
index bda9e17..a434bbb 100644
--- a/drivers/spi/spi_qsd.h
+++ b/drivers/spi/spi_qsd.h
@@ -331,7 +331,7 @@
 				    enum msm_spi_state state);
 static void msm_spi_write_word_to_fifo(struct msm_spi *dd);
 static inline void msm_spi_write_rmn_to_fifo(struct msm_spi *dd);
-static irqreturn_t msm_spi_qup_irq(int irq, void *dev_id);
+static inline irqreturn_t msm_spi_qup_irq(int irq, void *dev_id);
 
 #if defined(CONFIG_SPI_QSD) || defined(CONFIG_SPI_QSD_MODULE)
 static inline void msm_spi_disable_irqs(struct msm_spi *dd)