tree: Drop repeated words

Found-by: linter
Change-Id: I7c6d0887a45fdb4b6de294770a7fdd5545a9479b
Signed-off-by: Alexander Goncharov <chat@joursoir.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72795
Reviewed-by: Nicholas Chin <nic.c3.14@gmail.com>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Erik van den Bogaert <ebogaert@eltan.com>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/arch/arm/include/armv7/arch/cache.h

@@ -192,7 +192,7 @@ static inline uint32_t read_clidr(void)
 	return val;
 }
 
-/* read cache size ID register register (CCSIDR) */
+/* read cache size ID register (CCSIDR) */
 static inline uint32_t read_ccsidr(void)
 {
 	uint32_t val = 0;