mwifiex: fix PCIe register information for 8997 chipset

This patch corrects some information in mwifiex_pcie_card_reg()
structure for 8997 chipset

Fixes: 6d85ef00 ("mwifiex: add support for 8997 chipset")
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Shengzhen Li <szli@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>