staging: hv: Convert camel cased local variable names in channel_mgmt.c to lower case

Convert camel cased local variable names in channel_mgmt.c to lower case
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>