ASoC: amd: ps: Fix uninitialized ret in create_acp64_platform_devs()

Clang warns:

  sound/soc/amd/ps/pci-ps.c:218:2: error: variable 'ret' is used uninitialized whenever switch default is taken [-Werror,-Wsometimes-uninitialized]
          default:
          ^~~~~~~
  sound/soc/amd/ps/pci-ps.c:239:9: note: uninitialized use occurs here
          return ret;
                 ^~~
  sound/soc/amd/ps/pci-ps.c:190:9: note: initialize the variable 'ret' to silence this warning
          int ret;
                 ^
                  = 0
  1 error generated.

ret is used uninitialized if 'goto de_init' is taken. As this is not an
error nor should the ACP be deinitialized, just directly return 0 in
this case statement, which resolves the warning.

Fixes: 1d325cd ("ASoC: amd: ps: refactor platform device creation logic")
Link: ClangBuiltLinux#1779
Suggested-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>

sound/soc/amd/ps/pci-ps.c

@@ -217,7 +217,7 @@ static int create_acp63_platform_devs(struct pci_dev *pci, struct acp63_dev_data
 		break;
 	default:
 		dev_dbg(&pci->dev, "No PDM devices found\n");
-		goto de_init;
+		return 0;
 	}
 
 	for (index = 0; index < adata->pdev_count; index++) {