hwmon: (sparx5) Use devm_clk_get_enabled() helper

hwmon: (sparx5) Use devm_clk_get_enabled() helper

The devm_clk_get_enabled() helper:
   - calls devm_clk_get()
   - calls clk_prepare_enable() and registers what is needed in order to
     call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code, the error handling paths and avoid the need of
a dedicated function used with devm_add_action_or_reset().

Based on my test with allyesconfig, this reduces the .o size from:
   text	   data	    bss	    dec	    hex	filename
   2419	   1472	      0	   3891	    f33	drivers/hwmon/sparx5-temp.o
down to:
   2155	   1472	      0	   3627	    e2b	drivers/hwmon/sparx5-temp.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/cfe4c965074b5ecbe03830b05e038b4594c7b970.1661336689.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Guenter Roeck <linux@roeck-us.net>