Add a "4MB without OTA" partition scheme

This is needed on the camera board, because we have a lot of code.

Author: jepler

ports/espressif/esp-idf-config/partitions-4MB-no-ota.csv

@@ -0,0 +1,7 @@
+# Name,             Type,   SubType,    Offset,     Size
+# bootloader,       app,    boot,       0x1000/0x0, 28/32K
+# partition_table,  data,   table,      0x8000,     4K
+nvs,                data,   nvs,        0x9000,     28K
+ota_0,              app,    ota_0,      0x10000,    2112K
+uf2,                app,    factory,    0x220000,   256K
+user_fs,            data,   fat,        0x260000,   1664K

ports/espressif/esp-idf-config/sdkconfig-4MB-no-ota.defaults

@@ -0,0 +1,18 @@
+#
+# Serial flasher config
+#
+# CONFIG_ESPTOOLPY_FLASHSIZE_1MB is not set
+# CONFIG_ESPTOOLPY_FLASHSIZE_2MB is not set
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+# CONFIG_ESPTOOLPY_FLASHSIZE_8MB is not set
+# CONFIG_ESPTOOLPY_FLASHSIZE_16MB is not set
+CONFIG_ESPTOOLPY_FLASHSIZE="4MB"
+CONFIG_ESPTOOLPY_FLASHSIZE_DETECT=y
+# end of Serial flasher config
+
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="esp-idf-config/partitions-4MB-no-ota.csv"
+#
+# Partition Table
+#
+CONFIG_PARTITION_TABLE_FILENAME="esp-idf-config/partitions-4MB-no-ota.csv"
+# end of Partition Table