ASRock E350M1: PlatformGnbPcie.c: Do not return anything for void return type

When building the ASRock E350M1, the following warning is shown.

    $ make # on Jenkins (build server)
    […]
        CC         mainboard/asrock/e350m1/PlatformGnbPcie.romstage.o
        CC         mainboard/asrock/e350m1/agesawrapper.romstage.o
        CC         mainboard/asrock/e350m1/buildOpts.romstage.o
    src/mainboard/asrock/e350m1/PlatformGnbPcie.c: In function 'OemCustomizeInitEarly':
    src/mainboard/asrock/e350m1/PlatformGnbPcie.c:131:5: warning: 'return' with a value, in function returning void [enabled by default]
    […]

The function signature is (the return type might not be part of this though [1]),

    VOID
    OemCustomizeInitEarly (
      IN  OUT AMD_EARLY_PARAMS    *InitEarly
      )

so do not return anything.

All other AMD Family 14 boards already have the correct code. For example
following commit fixed this for AMD Persimmon.

    commit d7a696d0f2
    Author: efdesign98 <efdesign98@gmail.com>
    Date:   Thu Sep 15 15:24:26 2011 -0600

        Persimmon updates for AMD F14 rev C0

        Reviewed-on: http://review.coreboot.org/137

[1] http://cboard.cprogramming.com/cplusplus-programming/117286-what-exactly-function-signature.html

Change-Id: Ie60246bd9bb8452efd096e6838d8610f6364a6aa
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/2954
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martin.roth@se-eng.com>

src/mainboard/asrock/e350m1/PlatformGnbPcie.c

@@ -128,7 +128,7 @@ PCIe_COMPLEX_DESCRIPTOR Brazos = {
   if ( Status!= AGESA_SUCCESS) {
     // Could not allocate buffer for PCIe_COMPLEX_DESCRIPTOR , PCIe_PORT_DESCRIPTOR and PCIe_DDI_DESCRIPTOR
     ASSERT(FALSE);
-    return Status;
+    return;
   }
 
   BrazosPcieComplexListPtr  =  (PCIe_COMPLEX_DESCRIPTOR *) AllocHeapParams.BufferPtr;