wifi: ath12k: remove unneeded semicolon in ath12k_mac_parse_tx_pwr_env()

wifi: ath12k: remove unneeded semicolon in ath12k_mac_parse_tx_pwr_env()

Kernel bot warns about this unneeded semicolon:

	drivers/net/wireless/ath/ath12k/mac.c:9785:2-3: Unneeded semicolon

Remove it.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00284.1-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202507132355.ljWuxxjd-lkp@intel.com/
Signed-off-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Link: https://patch.msgid.link/20250715-ath12k-unneed-semicolon-v1-1-9972fd4cef07@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>