Merge branch 'driver_merge_tmp/fix_fifo_struct_header' into 'master'

use uint8_t for fifo struct in uart and i2c

use uint8_t for fifo struct in uart and i2c

See merge request !106

components/esp32/include/soc/i2c_struct.h

@@ -97,8 +97,8 @@ typedef volatile struct {
     } fifo_conf;
     union {
         struct {
-            uint32_t data:       8;                 /*The register represent the byte  data read from rx_fifo when use apb fifo access*/
-            uint32_t reserved8: 24;
+            uint8_t data;                           /*The register represent the byte  data read from rx_fifo when use apb fifo access*/
+            uint8_t reserved[3];
         };
         uint32_t val;
     } fifo_data;