Disable relaxation for gp load

riscv-rt/asm.S

@@ -13,10 +13,10 @@ _start:
     .cfi_startproc
     .cfi_undefined ra
 
-    // .option push
-    // .option norelax
+    .option push
+    .option norelax
     la gp, __global_pointer$
-    // .option pop
+    .option pop
 
     la sp, _stack_start