Costmetic changes to some comments

arch/arm/src/sam34/sam_vectors.S

@@ -440,7 +440,7 @@ exception_common:
 	ldr		r14, =EXC_RETURN_PRIVTHR	/* Load the special value */
 #endif
 
-    /* Restore the interrupt state */
+	/* Restore the interrupt state */
 
 #ifdef CONFIG_ARMV7M_USEBASEPRI
 	msr		basepri, r3				/* Restore interrupts priority masking */

drivers/serial/serialirq.c

@@ -147,8 +147,8 @@ void uart_recvchars(FAR uart_dev_t *dev)
       nexthead = 0;
     }
 
-  /* Loop putting characters into the receive buffer until either there are no
-   * further characters to available.
+  /* Loop putting characters into the receive buffer until there are no further
+   * characters to available.
    */
 
   while (uart_rxavailable(dev))