zynqmp: migrate gqspi debug to logging

The following patch migrates the usage of debug and printf functions
to the relevant logging function as per U-Boot DM guidelines.

Additionally some of the debugging statements have been rearanged for
a more meaningfull debug experience.

aarch64-linux-gnu-size reports 229 bytes less when debug is enabled at
file level, while is just 5bytes more when disabled.

Signed-off-by: Ibai Erkiaga <ibai.erkiaga-elorza@amd.com>
Link: https://lore.kernel.org/r/20231013123739.2757979-1-ibai.erkiaga-elorza@amd.com


Signed-off-by: Michal Simek <michal.simek@amd.com>