[chirp_devel] [PATCH] [ID-51][ID-51 Plus] Add support for ID-51 Plus/Anniversary Edition (Fix #1961)

This patch adds support for the Icom ID-51 Anniversary and Plus Editions

Due to memory size conflicts, this also contains an update to the ID-51 driver that enhances detetion logic. The ID-51 has also been renamed from ID-51A as the A and E editions are identical (image-wise)

Confirmed and tested with both a real ID-51A Plus and an ID-51E Plus