platform: msm_shared: Fix compilation warnings in shared drivers

Fix compilation warnings.

Change-Id: I09246797de33c29a1edeace4af99d3cb78257071
diff --git a/platform/msm_shared/i2c_qup.c b/platform/msm_shared/i2c_qup.c
index 916d865..dc8481d 100644
--- a/platform/msm_shared/i2c_qup.c
+++ b/platform/msm_shared/i2c_qup.c
@@ -702,6 +702,7 @@
 	mask_interrupt(dev->qup_irq);
 }
 
+#if DEFINE_GSBI_I2C
 struct qup_i2c_dev *qup_i2c_init(uint8_t gsbi_id, unsigned clk_freq,
 				 unsigned src_clk_freq)
 {
@@ -739,6 +740,7 @@
 
 	return dev;
 }
+#endif
 
 struct qup_i2c_dev *qup_blsp_i2c_init(uint8_t blsp_id, uint8_t qup_id,
 									  uint32_t clk_freq, uint32_t src_clk_freq)