os/arch/arm/src/Makefile: Fix misspelling
@@ -59,7 +59,7 @@ else
ifeq ($(CONFIG_ARCH_CORTEXM4),y) # Cortex-M4 is ARMv7E-M
ARCH_SUBDIR = armv7-m
else
-ifeq ($(CONFIG_ARCH_CORTEXM7),y) # Cortex-M4 is ARMv7E-M
+ifeq ($(CONFIG_ARCH_CORTEXM7),y) # Cortex-M7 is ARMv7E-M
ARCH_SUBDIR = armv7-m
else
ifeq ($(CONFIG_ARCH_CORTEXR4),y) # Cortex-R4 is ARMv7-R
