tree d14a4e6db1b996f2eadf8d98871f3b711609e760
parent 4503377cac087b2a2a703b4466800ae629325414
author Jordan Yates <jordan.yates@data61.csiro.au> 1656672526 +1000
committer Carles Cufí <carles.cufi@nordicsemi.no> 1656764178 +0200

lorawan: move `REQUIRES_FULL_LIBC` dependency

Move the `REQUIRES_FULL_LIBC` dependency from `config LORA` to
`config LORAWAN`. The commit that added the `select` (f590d4fa) mentions
that this is required by `loramac-node`, which is only used by LoRaWAN,
not the base LoRa code.

This results in small FLASH savings when compiling the samples, but can
result in larger savings in more complex applications:
```
// With REQUIRES_FULL_LIBC
west build -b 96b_wistrio zephyr/samples/drivers/lora/send/
[162/162] Linking C executable zephyr/zephyr.elf
Memory region         Used Size  Region Size  %age Used
           FLASH:       37708 B       128 KB     28.77%
            SRAM:        8832 B        32 KB     26.95%
        IDT_LIST:          0 GB         2 KB      0.00%

// Without REQUIRES_FULL_LIBC
[181/181] Linking C executable zephyr/zephyr.elf
Memory region         Used Size  Region Size  %age Used
           FLASH:       37444 B       128 KB     28.57%
            SRAM:        8832 B        32 KB     26.95%
        IDT_LIST:          0 GB         2 KB      0.00%
```

Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>