build(marvell): avoid using recursive expansion for BLE_INCLUDES

Commit 559ab2df4 specifies that there should be a PLAT_INCLUDES
specifically for the BLE image. This is done with a quirky rule that
triggers only on the BLE files and relies on PLAT_INCLUDES expanding
recursively to work correctly.

Recursively expanded variables are a brittle part of the build system,
so this patch removes that aspect but keeps the BLE_INCLUDES principle
via the BLE_INCLUDE_DIRS variable that MAKE_C will correctly pick up.

Change-Id: Ibd10904f6a005fef9ed242b65e96662ce002eb18
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
1 file changed