dmaengine: mmp_tdma: enable COMPILE_TEST

To get more coverage, enable COMPILE_TEST for this driver.

While at it, to fix build on other archs, select MMP_SRAM only for ARCH_MMP
and also fix the platform header

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Zhangfei Gao <zhangfei.gao@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 7674a44..faf7023 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -304,9 +304,9 @@
 
 config MMP_TDMA
 	bool "MMP Two-Channel DMA support"
-	depends on ARCH_MMP
+	depends on ARCH_MMP || COMPILE_TEST
 	select DMA_ENGINE
-	select MMP_SRAM
+	select MMP_SRAM if ARCH_MMP
 	help
 	  Support the MMP Two-Channel DMA engine.
 	  This engine used for MMP Audio DMA and pxa910 SQU.
diff --git a/include/linux/platform_data/dma-mmp_tdma.h b/include/linux/platform_data/dma-mmp_tdma.h
index 0c72886..422d450 100644
--- a/include/linux/platform_data/dma-mmp_tdma.h
+++ b/include/linux/platform_data/dma-mmp_tdma.h
@@ -28,7 +28,7 @@
 	int granularity;
 };
 
-#ifdef CONFIG_ARM
+#ifdef CONFIG_MMP_SRAM
 extern struct gen_pool *sram_get_gpool(char *pool_name);
 #else
 static inline struct gen_pool *sram_get_gpool(char *pool_name)