Trivial fix to spacing

arch/arm/src/stm32f7/stm32_allocateheap.c

@@ -74,8 +74,8 @@
  * In order to use FMC SRAM, the following additional things need to be
  * present in the NuttX configuration file:
  *
- * CONFIG_STM32F7_FMC=y      : Enables the FMC
- * CONFIG_STM32F7_FMC_SRAM=y : Indicates that SRAM is available via the
+ * CONFIG_STM32F7_FMC=y       : Enables the FMC
+ * CONFIG_STM32F7_FMC_SRAM=y  : Indicates that SRAM is available via the
  *                              FMC (as opposed to an LCD or FLASH).
  * CONFIG_HEAP2_BASE          : The base address of the SRAM in the FMC
  *                              address space

configs/stm32f746g-disco/README.txt

@@ -353,7 +353,7 @@ STM32F746G-DISCO-specific Configuration Options
     AHB3
     ----
 
-    CONFIG_STM32F7_FMC           FMC control registers
+    CONFIG_STM32F7_FMC            FMC control registers
     CONFIG_STM32F7_QUADSPI        QuadSPI Control
 
   Timer devices may be used for different purposes.  One special purpose is