clk: bcm: rpi: Drop module alias

Since commit fbac2e77 ("clk: bcm: rpi: Allow the driver to
be probed by DT") the module alias isn't necessary anymore. So
we can drop it.

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://lore.kernel.org/r/20250415185614.16292-1-wahrenst@gmx.net


Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>