soc: nxp: imxrt: imxrt118x: Remove cm7 core condition for CPU_HAS_ICACHE

Although I/DCACHE aren't included under cm33 architecture,
NXP design and integrate Code Cache/Sys Cache for cm33 to
speed up the core execution efficiency.
For the convenience of developers, we believe that software
developers can directly use Code/Sys Cache as arm's I/D Cache.

Signed-off-by: Lucien Zhao <lucien.zhao@nxp.com>