Replace of all initial lowercase character in comments and debug messages
to uppercase to maintain coherence.

Fix messages coherence within the DesignWare driver.

Fix code style on dw_pcie_irq_domain_free() function.
Signed-off-by: NGustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: NJingoo Han <jingoohan1@gmail.com>
Acked-by: NJoao Pinto <jpinto@synopsys.com>