net: bcmasp: Remove phy_{suspend/resume}

phy_{suspend/resume} is redundant. It gets called from phy_{stop/start}.

Fixes: 490cb412 ("net: bcmasp: Add support for ASP2.0 Ethernet controller")
Signed-off-by: Justin Chen <justin.chen@broadcom.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>