ports/rp2: Skip flash copy buffer for non PSRAM.

Avoid an extra 4k static buffer being included in builds that do
not use PSRAM.

Signed-off-by: Phil Howard <[email protected]>

Author: Gadgetoid

ports/rp2/rp2_flash.c

@@ -264,11 +264,14 @@ static mp_obj_t rp2_flash_writeblocks(size_t n_args, const mp_obj_t *args) {
         offset += mp_obj_get_int(args[3]);
     }
 
+#if defined(MICROPY_HW_PSRAM_CS_PIN) && MICROPY_HW_ENABLE_PSRAM
     if ((uintptr_t)bufinfo.buf >= SRAM_BASE) {
+#endif
         mp_uint_t atomic_state = begin_critical_flash_section();
         flash_range_program(self->flash_base + offset, bufinfo.buf, bufinfo.len);
         end_critical_flash_section(atomic_state);
         mp_event_handle_nowait();
+#if defined(MICROPY_HW_PSRAM_CS_PIN) && MICROPY_HW_ENABLE_PSRAM
     } else {
         size_t bytes_left = bufinfo.len;
         size_t bytes_offset = 0;
@@ -287,6 +290,7 @@ static mp_obj_t rp2_flash_writeblocks(size_t n_args, const mp_obj_t *args) {
             mp_event_handle_nowait();
         }
     }
+#endif
 
     // TODO check return value
     return mp_const_none;