log: add underscore to lvolrpc log flag

This makes it more in line with other flags.

Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Change-Id: I2d2f720a6cf1a6aa0cf3ddc0691c7ffc0adc43fd
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4538
Reviewed-by: Mellanox Build Bot
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>

module/bdev/lvol/vbdev_lvol_rpc.c

@@ -38,7 +38,7 @@
 #include "spdk/string.h"
 #include "spdk_internal/log.h"
 
-SPDK_LOG_REGISTER_COMPONENT("lvolrpc", SPDK_LOG_LVOL_RPC)
+SPDK_LOG_REGISTER_COMPONENT("lvol_rpc", SPDK_LOG_LVOL_RPC)
 
 struct rpc_bdev_lvol_create_lvstore {
 	char *lvs_name;