hwrng: mxc-rnga - Fix Kconfig dependency

We can directly depend on SOC_IMX31 since commit c9ee94965dce
("ARM: imx: deconstruct mxc_rnga initialization")

Since that commit, CONFIG_HW_RANDOM_MXC_RNGA could not be switched on
with unknown symbol ARCH_HAS_RNGA and mxc-rnga.o can't be generated with
ARCH=arm make M=drivers/char/hw_random
Previously, HW_RANDOM_MXC_RNGA required ARCH_HAS_RNGA
which was based on IMX_HAVE_PLATFORM_MXC_RNGA  && ARCH_MXC.
IMX_HAVE_PLATFORM_MXC_RNGA  was based on SOC_IMX31.

Fixes: c9ee94965dce ("ARM: imx: deconstruct mxc_rnga initialization")
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 56ad5a5936a9..8c0770bf8881 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -244,7 +244,7 @@ config HW_RANDOM_TX4939
 
 config HW_RANDOM_MXC_RNGA
         tristate "Freescale i.MX RNGA Random Number Generator"
-        depends on ARCH_HAS_RNGA
+        depends on SOC_IMX31
         default HW_RANDOM
         ---help---
           This driver provides kernel-side support for the Random Number