[PATCH] staging: android ion/hisi: fix dependencies

[Arnd Bergmann]

The newly added Hi6220 Ion code fails to build when the ION_OF helpers
are not present:

drivers/staging/android/ion/hisilicon/hi6220_ion.o: In function `hi6220_ion_remove':
hi6220_ion.c:(.text.hi6220_ion_remove+0x4c): undefined reference to `ion_destroy_platform_data'
drivers/staging/android/ion/hisilicon/hi6220_ion.o: In function `hi6220_ion_probe':
hi6220_ion.c:(.text.hi6220_ion_probe+0x5c): undefined reference to `ion_parse_dt'
hi6220_ion.c:(.text.hi6220_ion_probe+0xf8): undefined reference to `ion_destroy_platform_data'

This selects the symbol when needed.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Fixes: 2b40182a19bc ("staging: android: ion: Add ion driver for Hi6220 SoC platform")
---
 drivers/staging/android/ion/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/android/ion/Kconfig b/drivers/staging/android/ion/Kconfig
index 94105544feef..c8fb4134c55d 100644
--- a/drivers/staging/android/ion/Kconfig
+++ b/drivers/staging/android/ion/Kconfig
@@ -36,6 +36,7 @@ config ION_TEGRA
 config ION_HISI
 	tristate "Ion for Hisilicon"
 	depends on ARCH_HISI && ION
+	select ION_OF
 	help
 	  Choose this option if you wish to use ion on Hisilicon Platform.
 
-- 
2.9.0