[bsp/hifive1]Fixed symbol error in interrupt.c
[bsp/hifive1]Fixed symbol error in interrupt.c

Note that the symbol ';;' is wrong in 'return (rt_uint32_t)PLIC_claim_interrupt(&g_plic);;',
so that ';;' should been replaced with ';'.
nongxiaoming/rt-thread,weety/rt-thread,weiyuliang/rt-thread,hezlog/rt-thread,weiyuliang/rt-thread,weiyuliang/rt-thread,armink/rt-thread,geniusgogo/rt-thread,armink/rt-thread,weety/rt-thread,weety/rt-thread,ArdaFu/rt-thread,geniusgogo/rt-thread,weiyuliang/rt-thread,armink/rt-thread,ArdaFu/rt-thread,RT-Thread/rt-thread,ArdaFu/rt-thread,weiyuliang/rt-thread,RT-Thread/rt-thread,hezlog/rt-thread,nongxiaoming/rt-thread,RT-Thread/rt-thread,hezlog/rt-thread,ArdaFu/rt-thread,weety/rt-thread,nongxiaoming/rt-thread,geniusgogo/rt-thread,armink/rt-thread,hezlog/rt-thread,weety/rt-thread,hezlog/rt-thread,RT-Thread/rt-thread,geniusgogo/rt-thread,weiyuliang/rt-thread,hezlog/rt-thread,armink/rt-thread,armink/rt-thread,hezlog/rt-thread,RT-Thread/rt-thread,weety/rt-thread,geniusgogo/rt-thread,nongxiaoming/rt-thread,nongxiaoming/rt-thread,ArdaFu/rt-thread,RT-Thread/rt-thread,weety/rt-thread,armink/rt-thread,ArdaFu/rt-thread,weiyuliang/rt-thread,ArdaFu/rt-thread,geniusgogo/rt-thread,geniusgogo/rt-thread,nongxiaoming/rt-thread,RT-Thread/rt-thread,nongxiaoming/rt-thread