bnxt_en: Add missing 200G link speed reporting

bnxt_fw_to_ethtool_speed() is missing the case statement for 200G
link speed reported by firmware.  As a result, ethtool will report
unknown speed when the firmware reports 200G link speed.

Fixes: 532262ba ("bnxt_en: ethtool: support PAM4 link speeds up to 200G")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -1226,6 +1226,7 @@ struct bnxt_link_info {
 #define BNXT_LINK_SPEED_40GB	PORT_PHY_QCFG_RESP_LINK_SPEED_40GB
 #define BNXT_LINK_SPEED_50GB	PORT_PHY_QCFG_RESP_LINK_SPEED_50GB
 #define BNXT_LINK_SPEED_100GB	PORT_PHY_QCFG_RESP_LINK_SPEED_100GB
+#define BNXT_LINK_SPEED_200GB	PORT_PHY_QCFG_RESP_LINK_SPEED_200GB
 	u16			support_speeds;
 	u16			support_pam4_speeds;
 	u16			auto_link_speeds;	/* fw adv setting */

drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c

@@ -1714,6 +1714,8 @@ u32 bnxt_fw_to_ethtool_speed(u16 fw_link_speed)
 		return SPEED_50000;
 	case BNXT_LINK_SPEED_100GB:
 		return SPEED_100000;
+	case BNXT_LINK_SPEED_200GB:
+		return SPEED_200000;
 	default:
 		return SPEED_UNKNOWN;
 	}