Revert "net: broadcom: Fix BCMGENET Kconfig"

This reverts commit fbb4e8e6 which is
commit 8d820bc9 upstream.

It causes runtime failures as reported by Naresh and Arnd writes:

	Greg, please just revert fbb4e8e6 ("net: broadcom: Fix BCMGENET Kconfig")
	in stable/linux-5.10.y: it depends on e5f31552 ("ethernet: fix
	PTP_1588_CLOCK dependencies"), which we probably don't want backported
	from 5.15 to 5.10.

So it should be reverted.

Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/CA+G9fYsXomPXcecPDzDydO3=i2qHDM2RTtGxr0p2YOS6=YcWng@mail.gmail.com


Cc: YueHaibing <yuehaibing@huawei.com>
Cc: Florian Fainelli <f.fainelli@broadcom.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>