ARM: OMAP2+: Fix uninitialized sr_inst

stable inclusion
from stable-5.10.32
commit 4f90db2e92d2d4930c85cb2138b452510eab189c
bugzilla: 51796

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[ Upstream commit fc85dc42 ]

Fix uninitialized sr_inst.

Fixes: fbfa463b ("ARM: OMAP2+: Fix smartreflex init regression after dropping legacy data")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>