Port of a Linux commit b4a8a51

  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: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
  Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
  Acked-by: Jingoo Han <jingoohan1@gmail.com>
  Acked-by: Joao Pinto <jpinto@synopsys.com>

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>