soc/intel/common/lpss: Drop now unused lpss_clk_read()

Change-Id: I7def72e820ee1a4fa47c34b26dab9e0886ba74e6
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33094
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lance Zhao <lance.zhao@gmail.com>

src/soc/intel/common/block/include/intelblocks/lpss.h

@@ -30,7 +30,4 @@ void lpss_clk_update(uintptr_t base, uint32_t clk_m_val, uint32_t clk_n_val);
 /* Check if controller is in reset. */
 bool lpss_is_controller_in_reset(uintptr_t base);
 
-/* Read LPSS CLK register */
-uint32_t lpss_clk_read(uintptr_t base);
-
 #endif	/* SOC_INTEL_COMMON_BLOCK_LPSS_H */

src/soc/intel/common/block/lpss/lpss.c

@@ -69,12 +69,3 @@ void lpss_clk_update(uintptr_t base, uint32_t clk_m_val, uint32_t clk_n_val)
 
 	write32(addr, clk_sel);
 }
-
-uint32_t lpss_clk_read(uintptr_t base)
-{
-	uint8_t *addr = (void *)base;
-
-	addr += LPSS_CLOCK_CTL_REG;
-
-	return read32(addr);
-}