xtensa_macros.S: fix tab/space mismatches

arch/xtensa/src/common/xtensa_macros.S

@@ -42,32 +42,32 @@
  ****************************************************************************/
 
 #if !defined(CONFIG_SMP) && CONFIG_ARCH_INTERRUPTSTACK > 15
-    .macro	setintstack tmp1 tmp2
+	.macro	setintstack tmp1 tmp2
 
 	/* Load g_intstacktop (the start of the interrupt stack) */
 
 	movi	\tmp1, g_intstacktop
 
-    /* If a1 < g_intstackalloc (outside the interrupt stack boundary),
+	/* If a1 < g_intstackalloc (outside the interrupt stack boundary),
 	 * set a1 (sp) to g_intstacktop (switch to the interrupt stack).
 	 */
 
 	movi	\tmp2, g_intstackalloc	/* Load the end (low address) of the interrupt stack */
-    sub		\tmp2, a1, \tmp2
-    movltz	a1, \tmp1, \tmp2
+	sub		\tmp2, a1, \tmp2
+	movltz	a1, \tmp1, \tmp2
 
-    /* If a1 >= g_intstacktop, sp is outside the interrupt stack boundaries */
+	/* If a1 >= g_intstacktop, sp is outside the interrupt stack boundaries */
 
 	movi	\tmp2, g_intstacktop   /* Load the start (high address) of the interrupt stack */
-    sub		\tmp2, a1, \tmp2
-    movgez	a1, \tmp1, \tmp2
+	sub		\tmp2, a1, \tmp2
+	movgez	a1, \tmp1, \tmp2
 
 	/* If neither movltz and movgez moved g_intstacktop (on /tmp1) to a1,
 	 * it means that the stack pointer was already pointing to the interrupt
 	 * stack and no action is required.
 	 */
 
-    .endm
+	.endm
 #endif
 
 /****************************************************************************