powerpc/powernv: Fix endian issues in OPAL RTC driver

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/platforms/powernv/opal-rtc.c

@@ -48,6 +48,8 @@ unsigned long __init opal_get_boot_time(void)
 	}
 	if (rc != OPAL_SUCCESS)
 		return 0;
+	y_m_d = be32_to_cpu(y_m_d);
+	h_m_s_ms = be64_to_cpu(h_m_s_ms);
 	opal_to_tm(y_m_d, h_m_s_ms, &tm);
 	return mktime(tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
 		      tm.tm_hour, tm.tm_min, tm.tm_sec);
@@ -68,6 +70,8 @@ void opal_get_rtc_time(struct rtc_time *tm)
 	}
 	if (rc != OPAL_SUCCESS)
 		return;
+	y_m_d = be32_to_cpu(y_m_d);
+	h_m_s_ms = be64_to_cpu(h_m_s_ms);
 	opal_to_tm(y_m_d, h_m_s_ms, tm);
 }
 
@@ -86,6 +90,9 @@ int opal_set_rtc_time(struct rtc_time *tm)
 	h_m_s_ms |= ((u64)bin2bcd(tm->tm_min)) << 48;
 	h_m_s_ms |= ((u64)bin2bcd(tm->tm_sec)) << 40;
 
+	y_m_d = cpu_to_be32(y_m_d);
+	h_m_s_ms = cpu_to_be64(h_m_s_ms);
+
 	while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
 		rc = opal_rtc_write(y_m_d, h_m_s_ms);
 		if (rc == OPAL_BUSY_EVENT)