6.6-stable patches

added patches:
	spi-imx-fix-use-after-free-on-unbind.patch
	um-drivers-call-kernel_strrchr-explicitly-in-cow_user.c.patch
	wifi-rtw88-check-for-pci-upstream-bridge-existence.patch
	zram-do-not-forget-to-endio-for-partial-discard-requests.patch