ARC: Fix comment typo

 - Remove one of the repeated 'call' in comment line 396.
 - Delete the redundant word 'to', 'since'
Signed-off-by: Jilin Yuan <yuanjilin@cdjrlc.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>

arch/arc/kernel/smp.c

@@ -385,7 +385,7 @@ irqreturn_t do_IPI(int irq, void *dev_id)
  * API called by platform code to hookup arch-common ISR to their IPI IRQ
  *
  * Note: If IPI is provided by platform (vs. say ARC MCIP), their intc setup/map
- * function needs to call call irq_set_percpu_devid() for IPI IRQ, otherwise
+ * function needs to call irq_set_percpu_devid() for IPI IRQ, otherwise
  * request_percpu_irq() below will fail
  */
 static DEFINE_PER_CPU(int, ipi_dev);

arch/arc/mm/cache.c

@@ -750,7 +750,7 @@ static inline void arc_slc_enable(void)
  *  -In SMP, if hardware caches are coherent
  *
  * There's a corollary case, where kernel READs from a userspace mapped page.
- * If the U-mapping is not congruent to to K-mapping, former needs flushing.
+ * If the U-mapping is not congruent to K-mapping, former needs flushing.
  */
 void flush_dcache_page(struct page *page)
 {
@@ -910,7 +910,7 @@ EXPORT_SYMBOL(flush_icache_range);
  * @vaddr is typically user vaddr (breakpoint) or kernel vaddr (vmalloc)
  *    However in one instance, when called by kprobe (for a breakpt in
  *    builtin kernel code) @vaddr will be paddr only, meaning CDU operation will
- *    use a paddr to index the cache (despite VIPT). This is fine since since a
+ *    use a paddr to index the cache (despite VIPT). This is fine since a
  *    builtin kernel page will not have any virtual mappings.
  *    kprobe on loadable module will be kernel vaddr.
  */