esp8266: Convert mp_hal_pin_obj_t from pin ptr to simple integer.
Most pin I/O can be done just knowing the pin number as a simple
integer, and it's more efficient this way (code size, speed) because it
doesn't require a memory lookup to get the pin id from the pin object.
If the full pin object is needed then it can be easily looked up in the
pin table.
diff --git a/esp8266/modpybpin.c b/esp8266/modpybpin.c
index 2049d4b..a65911c 100644
--- a/esp8266/modpybpin.c
+++ b/esp8266/modpybpin.c
@@ -59,7 +59,7 @@
uint16_t phys_port;
} pin_irq_obj_t;
-STATIC const pyb_pin_obj_t pyb_pin_obj[16 + 1] = {
+const pyb_pin_obj_t pyb_pin_obj[16 + 1] = {
{{&pyb_pin_type}, 0, FUNC_GPIO0, PERIPHS_IO_MUX_GPIO0_U},
{{&pyb_pin_type}, 1, FUNC_GPIO1, PERIPHS_IO_MUX_U0TXD_U},
{{&pyb_pin_type}, 2, FUNC_GPIO2, PERIPHS_IO_MUX_GPIO2_U},