net/ixgbe/base: clean up

net/ixgbe/base: clean up

Change the parameter bypass_vlvf to vlvf_bypass for consistency
with ixgbe_common.c.

Clean up some whitespace and misalignment.

Change variable type of secrxreg from int to u32 as it's used
to store register value.

Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>