[BugFix][API-1476]update wifi FW 20 to 21

Affected branch:MR3.0-xx && GSW3.0

Affected module:wifi

Is it addected on both ZXIC and MTK: only MTK

Self-test: Yes

Doc Update: No

Change-Id: Ic5fdbf26d5ea40dc11c8ce414cdb24d82454a905
diff --git a/meta/meta-mediatek-mt2735/recipes-kernel/modules/files/wifi/wg870/config_pcie.trxse b/meta/meta-mediatek-mt2735/recipes-kernel/modules/files/wifi/wg870/config_pcie.trxse
index 975fae4..464eb37 100755
--- a/meta/meta-mediatek-mt2735/recipes-kernel/modules/files/wifi/wg870/config_pcie.trxse
+++ b/meta/meta-mediatek-mt2735/recipes-kernel/modules/files/wifi/wg870/config_pcie.trxse
Binary files differ