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sdhci_pci_o2_probe() uses pci_read_config_{byte,dword}() that return
PCIBIOS_* codes. The return code is then returned as is but as
sdhci_pci_o2_probe() is probe function chain, it should return normal
errnos.

Convert PCIBIOS_* returns code using pcibios_err_to_errno() into normal
errno before returning them. Add a label for read failure so that the
conversion can be done in one place rather than on all of the return
statements.

Fixes: 3d757ddb ("mmc: sdhci-pci-o2micro: add Bayhub new chip GG8 support for UHS-I")
Fixes: d599005a ("mmc: sdhci-pci-o2micro: Add missing checks in sdhci_pci_o2_probe")
Fixes: 706adf6b ("mmc: sdhci-pci-o2micro: Add SeaBird SeaEagle SD3 support")
Fixes: 01acf691 ("mmc: sdhci-pci: add support of O2Micro/BayHubTech SD hosts")
Fixes: 26daa1ed

 ("mmc: sdhci: Disable ADMA on some O2Micro SD/MMC parts.")
Cc: stable@vger.kernel.org
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20240527132443.14038-2-ilpo.jarvinen@linux.intel.com

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>