staging: r8188eu: txpktbuf_bndy is always 0

The only caller of iol_read_efuse sets the txpktbuf_bndy parameter to 0.
Remove the parameter from iol_read_efuse and use 0 in the function body.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220709171000.180481-10-martin@kaiser.cx


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>