[NANO130] Fix lp_ticker typo

Author: ccli8

targets/TARGET_NUVOTON/TARGET_NANO100/lp_ticker.c

@@ -141,7 +141,7 @@ timestamp_t lp_ticker_read()
         while (minor_clks == 0 || minor_clks == TMR2_CLK_PER_TMR2_INT);
 
         // Add power-down compensation
-        return ((uint64_t) major_minor_clks * US_PER_SEC / TMR3_CLK_PER_SEC / US_PER_TICK);
+        return ((uint64_t) major_minor_clks * US_PER_SEC / TMR2_CLK_PER_SEC / US_PER_TICK);
     }
     while (0);
 }