soc: qcom: pmic_glink: Fix boot when QRTR=m

We need to bail out before adding/removing devices if we are going to
-EPROBE_DEFER. Otherwise boot can get stuck in a probe deferral loop due
to a long-standing issue in driver core (see commit fbc35b45f9f6 ("Add
documentation on meaning of -EPROBE_DEFER")).

Deregistering the altmode child device can potentially also trigger bugs
in the DRM bridge implementation, which does not expect bridges to go
away.

[DB: slightly fixed commit message by adding the word 'commit']
Suggested-by: Dmitry Baryshkov <[email protected]>
Signed-off-by: Rob Clark <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
[ johan: rebase on 6.8-rc4, amend commit message and mention DRM ]
Fixes: 58ef4ece1e41 ("soc: qcom: pmic_glink: Introduce base PMIC GLINK driver")
Cc: <[email protected]>      # 6.3
Cc: Bjorn Andersson <[email protected]>
Signed-off-by: Johan Hovold <[email protected]>
Reviewed-by: Bjorn Andersson <[email protected]>
Reviewed-by: Dmitry Baryshkov <[email protected]>
Reviewed-by: Neil Armstrong <[email protected]>
Signed-off-by: Dmitry Baryshkov <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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