net: fix cache misaligned issue in Broadcom SF2 driver

net: fix cache misaligned issue in Broadcom SF2 driver

Fixed cache misaligned issue in the net driver. The issue shows-up when
a call to flush_dcache_range is made with unaligned memory. The memory
must be aligned to ARCH_DMA_MINALIGN.

Signed-off-by: Suji Velupillai <suji.velupillai@broadcom.com>
Tested-by: Suji Velupillai <suji.velupillai@broadcom.com>
Reviewed-by: Arun Parameswaran <arun.parameswaran@broadcom.com>
Reviewed-by: JD Zheng <jiandong.zheng@broadcom.com>
Reviewed-by: Shamez Kurji <shamez.kurji@broadcom.com>
Signed-off-by: Steve Rae <steve.rae@raedomain.com>
Cover Letter:
This series resolves issues specific to the Broadcom SF2 driver:
- fix cache misaligned issue
- convert to Kconfig
END
Acked-by: Joe Hershberger <joe.hershberger@ni.com>