sfc: fix builds without CONFIG_RTC_LIB

Add an embarrassingly missed semicolon plus and embarrassingly missed
parenthesis breaking kernel building when CONFIG_RTC_LIB is not set
like the one reported with ia64 config.

Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202302170047.EjCPizu3-lkp@intel.com/
Fixes: 14743dd ("sfc: add devlink info support for ef100")
Signed-off-by: Alejandro Lucero <alejandro.lucero-palau@amd.com>
Link: https://lore.kernel.org/r/20230220110133.29645-1-alejandro.lucero-palau@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Alejandro Lucero

drivers/net/ethernet/sfc/efx_devlink.c

@@ -323,7 +323,7 @@ static void efx_devlink_info_running_v2(struct efx_nic *efx,
 				    GET_VERSION_V2_OUT_SUCFW_BUILD_DATE);
 		rtc_time64_to_tm(tstamp, &build_date);
 #else
-		memset(&build_date, 0, sizeof(build_date)
+		memset(&build_date, 0, sizeof(build_date));
 #endif
 		build_id = MCDI_DWORD(outbuf, GET_VERSION_V2_OUT_SUCFW_CHIP_ID);