generic: move reserved_mem backports patch to generic

Move reserved_mem backports patch from airoha to generic dir as it will
be also used by backports package based on 6.18.

Link: https://github.com/openwrt/openwrt/pull/20964
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

diff --git a/target/linux/airoha/patches-6.12/083-01-v6.13-resource-Add-resource-set-range-and-size-helpers.patch b/target/linux/generic/backport-6.12/204-v6.13-resource-Add-resource-set-range-and-size-helpers.patch
similarity index 100%
rename from target/linux/airoha/patches-6.12/083-01-v6.13-resource-Add-resource-set-range-and-size-helpers.patch
rename to target/linux/generic/backport-6.12/204-v6.13-resource-Add-resource-set-range-and-size-helpers.patch

diff --git a/target/linux/airoha/patches-6.12/083-02-v6.16-of-reserved_mem-Add-functions-to-parse-memory-region.patch b/target/linux/generic/backport-6.12/205-v6.16-of-reserved_mem-Add-functions-to-parse-memory-region.patch
similarity index 100%
rename from target/linux/airoha/patches-6.12/083-02-v6.16-of-reserved_mem-Add-functions-to-parse-memory-region.patch
rename to target/linux/generic/backport-6.12/205-v6.16-of-reserved_mem-Add-functions-to-parse-memory-region.patch