hwrng: amd - remove reference to removed PPC_MAPLE config

Commit 62f8f307c80e ("powerpc/64: Remove maple platform") removes the
PPC_MAPLE config as a consequence of the platform’s removal.

The config definition of HW_RANDOM_AMD refers to this removed config option
in its dependencies.

Remove the reference to the removed config option.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index bf9b235..17854f0 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -50,7 +50,7 @@
 
 config HW_RANDOM_AMD
 	tristate "AMD HW Random Number Generator support"
-	depends on (X86 || PPC_MAPLE || COMPILE_TEST)
+	depends on (X86 || COMPILE_TEST)
 	depends on PCI && HAS_IOPORT_MAP
 	default HW_RANDOM
 	help