ASoC: Intel: avs: Fix uninitialized pointer error in probe()

ASoC: Intel: avs: Fix uninitialized pointer error in probe()

[ Upstream commit 11f74f48c14c1f4fe16541900ea5944c42e30ccf ]

If pcim_request_all_regions() fails, error path operates on
uninitialized 'bus' pointer. Found out by Coverity static analyzer.

Reviewed-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://patch.msgid.link/20250730124906.351798-1-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>