replace tabs with spaces

Author: mkardous-silabs

examples/platform/silabs/ldscripts/SiWx917-common.ld

@@ -152,7 +152,7 @@ SECTIONS
     *sl_si91x_low_power_tickless_mode.c.o(.text*)
     *sl_core_cortexm.c.o(.text*)
 
-		/* ipmu calibration data */
+    /* ipmu calibration data */
     *(.common_ipmu_ram*)
 
     . = ALIGN(4);