[PATCH 2/5] tools: imx8image: add upower image support

[Peng Fan]

> Subject: [PATCH 2/5] tools: imx8image: add upower image support
> 
> Part of the upower management was included in a previous commit [1].
> This patch only adds the bits required to properly parse a config file
> that would include the binary as follows:
> IMAGE PWR upower.bin
> 
> [1] 6ec65c8558f (tools: image: support i.MX93)
> 
> Signed-off-by: Gary Bisson <bisson.gary at gmail.com>

Reviewed-by: Peng Fan <peng.fan at nxp.com>