soc: qcom: pmic_glink: simplify locking with guard()

Simplify error handling over locks with guard().  In few places this
elimiates error gotos and local variables.  Switch to guard() everywhere
(except when jumps would go over scoped guard) for consistency, even if
it does not bring benefit in such places.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240822164815.230167-2-krzysztof.kozlowski@linaro.org


[bjorn: Rebased ontop of v6.13-rc1]
Signed-off-by: Bjorn Andersson <andersson@kernel.org>