py/emitinlinerv32: Move include of asmrv32.h to within feature guard.

Otherwise, when compiling on 16-bit systems (where `mp_uint_t` is 16 bits
wide) the compiler warns about "left shift count >= width of type", from
the static inline functions that have RV32_ENCODE_TYPE_xxx macros which
do a lot of bit shifting.

Signed-off-by: Damien George <damien@micropython.org>

py/emitinlinerv32.c

@@ -30,12 +30,13 @@
 #include <stdio.h>
 #include <string.h>
 
-#include "py/asmrv32.h"
 #include "py/emit.h"
 #include "py/misc.h"
 
 #if MICROPY_EMIT_INLINE_RV32
 
+#include "py/asmrv32.h"
+
 typedef enum {
 // define rules with a compile function
 #define DEF_RULE(rule, comp, kind, ...) PN_##rule,