assorted platforms: Remove CONFIG_RESET_PHY_R

Many platforms set CONFIG_RESET_PHY_R and then have an empty reset_phy
function.  Just don't enable this hook instead.

Signed-off-by: Tom Rini <trini@konsulko.com>
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Cc: Simon Glass <sjg@chromium.org>
Cc: Chris Packham <chris.packham@alliedtelesis.co.nz>
Cc: Stelian Pop <stelian@popies.net>
Cc: Eugen Hristev <eugen.hristev@collabora.com>