hns3: avoid linking objects into multiple modules

hns3: avoid linking objects into multiple modules

Each object file contains information about which module it gets linked
into, so linking the same file into multiple modules now causes a warning:

scripts/Makefile.build:254: drivers/net/ethernet/hisilicon/hns3/Makefile: hns3_common/hclge_comm_cmd.o is added to multiple modules: hclge hclgevf
scripts/Makefile.build:254: drivers/net/ethernet/hisilicon/hns3/Makefile: hns3_common/hclge_comm_rss.o is added to multiple modules: hclge hclgevf
scripts/Makefile.build:254: drivers/net/ethernet/hisilicon/hns3/Makefile: hns3_common/hclge_comm_tqp_stats.o is added to multiple modules: hclge hclgevf

Change the way that hns3 is built by moving the three common files into a
separate module with exported symbols instead.

Fixes: 5f20be4e90e6 ("net: hns3: refactor hns3 makefile to support hns3_common module")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://lore.kernel.org/r/20240528161603.2443125-1-arnd@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>