kernel: bump 6.6 to 6.6.45 and update config-6.6

kernel: bump 6.6 to 6.6.45 and update config-6.6

Build on at leasst x86/64 failed without adding the new ksym:
CONFIG_PCP_BATCH_SCALE_MAX=5

According to www.kernelconfig.io[1], this option seems to apply
to all arches so I placed it in target/linux/generic/config-6.6

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.45

Removed upstreamed:
	generic/backport-6.6/719-v6.11-net-phy-realtek-add-support-for-RTL8366S-Gigabit-PHY.patch[2]

All other patches automatically rebased.

1. https://www.kernelconfig.io/config_pcp_batch_scale_max?q=&kernelversion=6.10.3&arch=x86
2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.45&id=b45cbfa204b2a0985eb85dcb33d51714ee089bb9

Build system: x86/64
Build-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3
Run-tested: x86/64/AMD Cezanne, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3

Signed-off-by: John Audia <therealgraysky@proton.me>
Link: https://github.com/openwrt/openwrt/pull/16144
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>