platform: msm8994: Fix compilation warnings in msm8994 platform

Fix compilation errors in an effort to enable WERROR.

Change-Id: Ife28f736922f28777a4cd8a72538b1d9733f052e
diff --git a/platform/msm8994/include/platform/gpio.h b/platform/msm8994/include/platform/gpio.h
index bce399b..154fbdf 100644
--- a/platform/msm8994/include/platform/gpio.h
+++ b/platform/msm8994/include/platform/gpio.h
@@ -57,4 +57,7 @@
 
 void gpio_config_uart_dm(uint8_t id);
 void gpio_config_blsp_i2c(uint8_t, uint8_t);
+void gpio_set(uint32_t gpio, uint32_t dir);
+void gpio_tlmm_config(uint32_t gpio, uint8_t func, uint8_t dir, uint8_t pull,
+		uint8_t drvstr, uint32_t enable);
 #endif