spi: bcm63xx-hsspi: Export OF device ID table as module aliases

spi: bcm63xx-hsspi: Export OF device ID table as module aliases

The device table is required to load modules based on
modaliases. After adding MODULE_DEVICE_TABLE, below entries
for example will be added to module.alias:
alias:          of:N*T*Cbrcm,bcm6328-hsspiC*
alias:          of:N*T*Cbrcm,bcm6328-hsspi

Signed-off-by: Andres Galacho <andresgalacho@gmail.com>
Acked-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>