boot: zephyr: Default to LOG_MINIMAL

Enables LOG_MINIMAL in the default build, saving 2kB+ of free space for
its partition without losing logging functionality or other cost to the
end user.

Ref: NCSDK-7206

Signed-off-by: Stephen Stauts <stephen.stauts@nordicsemi.no>
diff --git a/boot/zephyr/prj.conf b/boot/zephyr/prj.conf
index 0c61b0f..03c5067 100644
--- a/boot/zephyr/prj.conf
+++ b/boot/zephyr/prj.conf
@@ -31,6 +31,7 @@
 # CONFIG_I2C is not set
 
 CONFIG_LOG=y
+CONFIG_LOG_MINIMAL=y
 ### Ensure Zephyr logging changes don't use more resources
 CONFIG_LOG_DEFAULT_LEVEL=0
 ### Decrease footprint by ~4 KB in comparison to CBPRINTF_COMPLETE=y