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Description: nvgpu_clk_pmupstate is the global structure in clk units. It is declared in clk.h and all clk units will include clk.h header. nvgpu_clk_pmupstate struct will have structure pointers to all clk units and will include genereic function pointers which are used by most clk units. The reason why the function pointers is defined in this sturct, and not included inside g->ops is because, these are only clk specific functions and rest of the driver code is not dependent on this. Each unit will have init function to allocate memory for its structure and will initialize its local functions. Changes: 1) Introduced nvgpu_clk_pmupstate in clk.h file. All the changes needed to call the above struct from individual clk units. 2) Removed cyclic dependency headers in clk units by calling function through pointers defined in clk.h. 3) Initialization of each unit is done in respective unit instead of doing it in clk unit. Added *_init_pmupstate and *_free_pmupstate to individual clk units. 4) Each unit clean up will be done separately while refactoring that unit. NVGPU-1963 NVGPU-2965 Change-Id: Iee79d7a812b62407252636057b104f952c94a229 Signed-off-by: rmylavarapu <rmylavarapu@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/2033537 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>