ARM: dts: am335x-pcm-953: Define fixed regulators in root node

stable inclusion
from stable-v5.10.157
commit 7cfb4b8579d3cbaa69a67dc1fc501b58d0c5f49b
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7MU59

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=7cfb4b8579d3cbaa69a67dc1fc501b58d0c5f49b



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[ Upstream commit 8950f345 ]

Remove the regulators node and define fixed regulators in the root node.
Prevents the sdhci-omap driver from waiting in probe deferral forever
because of the missing vmmc-supply and keeps am335x-pcm-953 consistent with
the other Phytec AM335 boards.

Fixes: bb07a829 ("ARM: dts: Add support for phyCORE-AM335x PCM-953 carrier board")
Signed-off-by: Dominik Haller <d.haller@phytec.de>
Message-Id: <20221011143115.248003-1-d.haller@phytec.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>