uvisor config isn`t under protected

[BabaYB]

I found that the uvisor config was not under protected, the uvisor config was linked before the symbol __uvisor_secure_end, It`s different with the design.

// vmpu_arch_init_hw() in vmpu_armv7m.c
vmpu_mpu_set_static_acl(
        0,
        FLASH_ORIGIN,
        ((uint32_t) __uvisor_config.secure_end) - FLASH_ORIGIN,
        UVISOR_TACLDEF_SECURE_CONST | UVISOR_TACL_EXECUTE,
        0
    );

[ciarmcom]

ARM Internal Ref: IOTSEC-632