net/faraday: fix grammar in function ftgmac100_setup_clk() in ftgmac100.c

"its not" is wrong. The words should be "it's not".

Signed-off-by: Hu Haowen <xianfengting221@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed