crypto: marvell/octeontx - use sysfs_emit() to instead of scnprintf()

Replace the open-code with sysfs_emit() to simplify the code.
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/marvell/octeontx/otx_cptvf_main.c

@@ -661,7 +661,7 @@ static ssize_t vf_type_show(struct device *dev,
 		msg = "Invalid";
 	}
 
-	return scnprintf(buf, PAGE_SIZE, "%s\n", msg);
+	return sysfs_emit(buf, "%s\n", msg);
 }
 
 static ssize_t vf_engine_group_show(struct device *dev,
@@ -670,7 +670,7 @@ static ssize_t vf_engine_group_show(struct device *dev,
 {
 	struct otx_cptvf *cptvf = dev_get_drvdata(dev);
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n", cptvf->vfgrp);
+	return sysfs_emit(buf, "%d\n", cptvf->vfgrp);
 }
 
 static ssize_t vf_engine_group_store(struct device *dev,
@@ -706,7 +706,7 @@ static ssize_t vf_coalesc_time_wait_show(struct device *dev,
 {
 	struct otx_cptvf *cptvf = dev_get_drvdata(dev);
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n",
+	return sysfs_emit(buf, "%d\n",
 			 cptvf_read_vq_done_timewait(cptvf));
 }
 
@@ -716,7 +716,7 @@ static ssize_t vf_coalesc_num_wait_show(struct device *dev,
 {
 	struct otx_cptvf *cptvf = dev_get_drvdata(dev);
 
-	return scnprintf(buf, PAGE_SIZE, "%d\n",
+	return sysfs_emit(buf, "%d\n",
 			 cptvf_read_vq_done_numwait(cptvf));
 }