arm: Fix up a stale comment in sections.c

There are currently four symbols here, so drop the word 'two'.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/arch/arm/lib/sections.c b/arch/arm/lib/sections.c
index 07efaba..8955aa6 100644
--- a/arch/arm/lib/sections.c
+++ b/arch/arm/lib/sections.c
@@ -5,7 +5,7 @@
 #include <linux/compiler.h>
 
 /**
- * These two symbols are declared in a C file so that the linker
+ * These symbols are declared in a C file so that the linker
  * uses R_ARM_RELATIVE relocation, rather than the R_ARM_ABS32 one
  * it would use if the symbols were defined in the linker file.
  * Using only R_ARM_RELATIVE relocation ensures that references to