net: microchip: dead code cleanup in kconfig for FDMA

net: microchip: dead code cleanup in kconfig for FDMA

The Kconfig in the parent directory already has the first 'if NET_VENDOR_MICROCHIP'
gating the inclusion of this Kconfig, meaning that the second
'if NET_VENDOR_MICROCHIP' condition is effectively dead code.

I propose removing the second 'if NET_VENDOR_MICROCHIP' in
drivers/net/ethernet/microchip/fdma/Kconfig

This dead code was found by kconfirm, a static analysis tool for Kconfig.

Signed-off-by: Julian Braha <julianbraha@gmail.com>
Link: https://patch.msgid.link/20260329185348.526893-1-julianbraha@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>