media: atomisp: get rid of two unused functions

Those cause build to break with -Werror with clang-12:

	drivers/staging/media/atomisp/pci/hive_isp_css_common/host/gdc.c:121:24: error: unused function 'gdc_reg_load' [-Werror,-Wunused-function]
	drivers/staging/media/atomisp/pci/isp/kernels/raw/raw_1.0/ia_css_raw.host.c:33:1: error: unused function 'sh_css_elems_bytes_from_info' [-Werror,-Wunused-function]
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/pci/hive_isp_css_common/host/gdc.c

@@ -28,10 +28,6 @@ static inline void gdc_reg_store(
     const unsigned int	reg,
     const hrt_data		value);
 
-static inline hrt_data gdc_reg_load(
-    const gdc_ID_t		ID,
-    const unsigned int	reg);
-
 #ifndef __INLINE_GDC__
 #include "gdc_private.h"
 #endif /* __INLINE_GDC__ */
@@ -117,10 +113,3 @@ static inline void gdc_reg_store(
 	ia_css_device_store_uint32(GDC_BASE[ID] + reg * sizeof(hrt_data), value);
 	return;
 }
-
-static inline hrt_data gdc_reg_load(
-    const gdc_ID_t		ID,
-    const unsigned int	reg)
-{
-	return ia_css_device_load_uint32(GDC_BASE[ID] + reg * sizeof(hrt_data));
-}

drivers/staging/media/atomisp/pci/isp/kernels/raw/raw_1.0/ia_css_raw.host.c

@@ -29,12 +29,6 @@ static const struct ia_css_raw_configuration default_config = {
 	.pipe = (struct sh_css_sp_pipeline *)NULL,
 };
 
-static inline unsigned
-sh_css_elems_bytes_from_info(unsigned int raw_bit_depth)
-{
-	return CEIL_DIV(raw_bit_depth, 8);
-}
-
 /* MW: These areMIPI / ISYS properties, not camera function properties */
 static enum sh_stream_format
 css2isp_stream_format(enum atomisp_input_format from) {