baremetal: arm allow using floating point instructions

baremetal/arch/arm/dump_regs.c

@@ -0,0 +1,15 @@
+/* I want to move el and all other "what's the initial value of such system register" into here. */
+
+#include <stdio.h>
+#include <inttypes.h>
+
+int main(void) {
+    uint32_t cpsr;
+    uint32_t mvfr1;
+    __asm__ ("mrs %0, cpsr" : "=r" (cpsr) : :);
+    /* TODO this is blowing up an exception, how to I read from it? */
+    /*__asm__ ("vmrs %0, mvfr1" : "=r" (mvfr1) : :);*/
+    printf("cpsr  %" PRIx32 "\n", cpsr);
+    /*printf("mvfr1 %" PRIx32 "\n", mvfr1);*/
+    return 0;
+}